107.0000 Family Potamogetonaceae Bercht. & J.Presl; Prír. Rostlin 1(7-13): 1, 3 (1823), nom. cons.

5-7 genera, ca. 110 spp.

Species listed in database: 107; hybrids: 84

107.0005 Genus Potamogeton L.; Sp. Pl. [Linnaeus] 1: 126 (1753)

Distribution: cosmopolitan freshwater aquatics, but chiefly extratrop. regions

Species listed in database: 84; hybrids: 81

species :

Potamogeton acutifolius Link; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 513 (1818)

Name: Spitzblättriges Laichkraut (DE), Sharp-leaved Pondweed (EN)

Distribution: England (E- & S-England); Denmark; Sweden; Netherlands; Belgium; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; France; Italy; Slovenia; Serbia; Kosovo; Albania; Romania; Bulgaria; Estonia; Latvia; Lithuania; European Russia (C-European Russia, E-European Russia, W-European Russia); Ukraine; Siberia (Altai); Kazakhstan; Northern Caucasus; China (Heilongjiang, Jilin, Liaoning, Nei Mongol, Shaanxi); Mongolia

10 DEN GRB SWE 11 AUT BGM CZE GER HUN NET POL SLO SWI 12 FRA 13 ALB BUL ITA KOS ROM SLV SRB 14 EST LAT LIT RUS UKR 30 SIB 32 KAZ 33 NCS 36 CHI 37 MON

Synonyms: hidden

= Potamogeton acutifolius f. minor (Fieber) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 17 (1845)

= Potamogeton acutifolius var. divaricatus Wimm. & Grab.; Fl. Siles. [Wimmer & Grabowski] 1: 143 (1827)

= Potamogeton acutifolius var. major Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 272 (1838)

= Potamogeton acutifolius var. minor Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 272 (1838)

= Potamogeton carinatus Kupffer; Korrespondenzbl. Naturf.-Vereins Riga 49: 164 (1906), et Repert. Spec. Nov. Regni Veg. 6: 121

= Potamogeton compressus subsp. acutifolius (Roem. & Schult.) Hook.f.; Student´s Fl. Brit. Isl. 373 (1870)

= Potamogeton cuspidatus Schrad. ex Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 854 (1823)

= Potamogeton henningii A.Benn.; J. Bot. 48: 151 (1910)

= Potamogeton laticaulis Wahlenb.; Fl. Suec. [Wahlenberg] 1: 111 (1824)

species :

Potamogeton alpinus Balb.; Mem. Acad. Sci. Turin, Sci. Phys. 10-11: 329 (1804)

Name: Alpine Pondweed, Red Pondweed (EN), Alpen-Laichkraut (DE)

Distribution: Iceland; Faeroe Isl.; England (England, Wales, +Isle of Man, Scotland, Outer Hebrides); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, +Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, +Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Liechtenstein; Austria; Poland; Czech Republic; Slovakia; Spain (N-Spain: Pyrénées); Andorra; France; ?Corsica; Italy; Slovenia; Croatia; Bosnia & Hercegovina; Romania; ?Bulgaria; ?Greece; Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Magadan, Primorye, Sakhalin); Kazakhstan; Uzbekistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (NE-Anatolia); China (NE-China, Xinjiang, Yunnan); Tibet; Mongolia; South Korea; Japan (Hokkaido); N-India (Assam, Jammu & Kashmir); Myanmar; Alaska; Greenland; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (California, Colorado, Connecticut, Idaho, Massachusetts, Maine, Michigan, Minnesota, Montana, New Hampshire, New Jersey, New Mexico, Nevada, New York, Oregon, Pennsylvania, South Dakota, Utah, Vermont, Washington State, Wisconsin, Wyoming)

10 DEN FIN FOR GRB ICE IRE NOR SWE 11 AUT BGM CZE GER LIE LUX NET POL SLO SWI 12 ADO FRA SPA 13 BIH CRO ITA ROM SLV 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ UZB 33 ARM AZE GEO NCS 34 TUR 36 CHI TIB 37 MON 38 JAP KOR 40 IND 41 MYA 70 ASK CDN GNL 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA

Synonyms: hidden

= Buccaferrea rufescens (Schrad.) Bubani; Fl. Pyren. [Bubani] 4: 12 (1902)

= Potamogeton alpinonatans F.W.Schultz; Jahresber. Pollichia 20-21: 228 (1863)

= Potamogeton alpinus proles casparyi (Kohts) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 312 (1897)

= Potamogeton alpinus f. angustifolius (Cham.) Hagstr.; Sver. Fl. 798 (1901)

= Potamogeton alpinus f. borealis Tiselius; Potamog. Suec. Exs. 1: no. 16 (1894)

= Potamogeton alpinus f. brevifolius Tiselius; Potamog. Suec. Exs. 3: no. 136 (1897)

= Potamogeton alpinus f. gracilior Tiselius; Potamog. Suec. Exs. 1: no. 17 (1894)

= Potamogeton alpinus f. gracillimus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 143 (1916)

= Potamogeton alpinus f. iteratus Tiselius; Potamog. Suec. Exs. 1: no. 18 (1894)

= Potamogeton alpinus f. latifolius (Cham.) Hagstr.; Skand. Fl. 1: 93 (1922)

= Potamogeton alpinus f. linearifolius (Hagstr.) Hagstr.; Skand. Fl. 1: 93 (1922)

= Potamogeton alpinus f. longifolius Tiselius; Potamog. Suec. Exs. 1: no. 15 (1894)

= Potamogeton alpinus f. minor (Hartm.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 143 (1916)

= Potamogeton alpinus f. ovatifolius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 143 (1916)

= Potamogeton alpinus f. purpurascens (Seidl ex J.Presl & C.Pesl) Hagstr.; Sver. Fl. 798 (1901)

= Potamogeton alpinus f. purpurascens (Seidl. ex J.Presl & C.Presl) Hagstr.; Sver. Fl. 798 (1901)

= Potamogeton alpinus f. viridis Tiselius; Potamog. Suec. Exs. 1: no. 14 (1894)

= Potamogeton alpinus subsp. casparyi (Kohts) Hegi; Ill. Fl. Mitt.-Eur. [Hegi] 1: 127 (1907)

= Potamogeton alpinus subsp. tenuifolius (Raf.) Hultén; Fl. Aleutian Isl. 65 (1937)

= Potamogeton alpinus subvar. borealis (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 73 (1907)

= Potamogeton alpinus subvar. brevifolius (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 73 (1907)

= Potamogeton alpinus subvar. gracilior (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 73 (1907)

= Potamogeton alpinus subvar. iteratus (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 73 (1907)

= Potamogeton alpinus subvar. longifolius (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 73 (1907)

= Potamogeton alpinus var. angustifolius Baguet; Bull. Soc. Roy. Bot. Belgique 15: 139 (1876)

= Potamogeton alpinus var. czarnohorensis Zapal.; Rozpr. Wydz. Mat.-Przyr. Akad. Umiejetn., Dzial B, Nauki Biol., Ser. 3, 6B(46B): 246 (1906)

= Potamogeton alpinus var. faxonii Stevens; Ill. Guide Fl. Pl. 96 (1910)

= Potamogeton alpinus var. lacustris T.Marsson; Fl. Neu-Vorpommern 490 (1869)

= Potamogeton alpinus var. linearifolius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 143 (1916)

= Potamogeton alpinus var. minor (Hartm.) Hagstr.; Skand. Fl. 1: 94 (1922)

= Potamogeton alpinus var. obscurus (DC.) Baguet; Bull. Soc. Roy. Bot. Belgique 15: 139 (1876)

= Potamogeton alpinus var. palustris (Mert. & W.D.J.Koch) T.Marsson; Fl. Neu-Vorpommern 490 (1869)

= Potamogeton alpinus var. purpurascens (Seidl ex J.Presl & C.Presl) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 311 (1897)

= Potamogeton alpinus var. rivularis (Hartm.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 143 (1916)

= Potamogeton alpinus var. spathulatus T.Marsson; Fl. Neu-Vorpommern 490 (1869)

= Potamogeton alpinus var. subellipticus (Fernald) Ogden; Rhodora 45: 94 (1943)

= Potamogeton alpinus var. tenuifolius (Raf.) Ogden; Rhodora 45: 90 (1943)

= Potamogeton annulatus Bellardi; Mém. Acad. Roy. Sci. (Turin) 10-11: 447 (1803)

= Potamogeton caricifolius Willd. ex Schult.; Mant. 3 [Schultes]: 367 (1827)

= Potamogeton caricifolius Wolfg.; Mant. 3 [Schultes & Schultes f.]: 367 (1827)

= Potamogeton casparyi Kohts; Oesterr. Bot. Z. 20: 321 (1870)

= Potamogeton lucens var. alpinus (Balb.) Fiori; Fl. Anal. Italia 1: 154 (1896)

= Potamogeton microstachys var. subellipticus Fernald; Rhodora 32: 82 (1930)

= Potamogeton microstachys Wolfg.; Mant. 3 [Schultes & Schultes f.]: 360 (1827)

= Potamogeton montanensis Gand.; Bull. Soc. Bot. France 66: 304 (1920)

= Potamogeton obrutus Alph.Wood; Class-book Bot. (ed. 2): 525 (1847)

= Potamogeton obscurus DC.; Fl. Franç. [de Candolle & Lamarck], éd. 3, 6: 311 (1815)

= Potamogeton obtusus Ducros ex Gaudin; Fl. Helv. 1: 546 (1828), nom. superfl.

= Potamogeton obtusus var. alpinus (Balb.) Gaudin; Fl. Helv. 1: 469 (1828)

= Potamogeton purpurascens Seidl ex J.Presl & C.Presl; Fl. Cech. 37 (1819)

= Potamogeton purpurascens var. angustifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 254 (1838)

= Potamogeton purpurascens var. lanceolatus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 254 (1838)

= Potamogeton purpurascens var. vulgaris Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 253 (1838)

= Potamogeton rigidus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 359 (1827)

= Potamogeton rufescens f. alpinus (Balb.) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 20 (1845)

= Potamogeton rufescens f. angustifolius Cham.; Linnaea 2: 211 (1827)

= Potamogeton rufescens f. latifolius Cham.; Linnaea 2: 212 (1827)

= Potamogeton rufescens f. semipellucidus (W.D.J.Koch & Ziz) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 21 (1845)

= Potamogeton rufescens Schrad.; Adnot. Fl. Berol. [Chamisso] 5 (1815)

= Potamogeton rufescens subsp. rigidus (Wolfg.) K.Richt.; Pl. Eur. [K.Richter] 1: 12 (1890)

= Potamogeton rufescens subsp. rivularis (Gillot) K.Richt.; Pl. Eur. [K.Richter] 1: 12 (1890)

= Potamogeton rufescens var. alpinus (Balb.) Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 842 (1823)

= Potamogeton rufescens var. angustifolius Bluff & Fingerh.; Comp. Fl. German. [Bluff & Fingerhuth] 219 (1825), nom. illeg.

= Potamogeton rufescens var. homophyllus Syme; Engl. Bot., ed. 3B, 9: 30 (1869)

= Potamogeton rufescens var. longifolius Bluff & Fingerh.; Comp. Fl. German. [Bluff & Fingerhuth] 219 (1825), nom. illeg.

= Potamogeton rufescens var. major Hartm.; Kongl. Vetensk. Acad. Handl. 1818: 158 (1818)

= Potamogeton rufescens var. minor Hartm.; Kongl. Vetensk. Acad. Handl. 1818: 158 (1818), et Handb. Skand. Fl. 79 (1820)

= Potamogeton rufescens var. palustris Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 841 (1823)

= Potamogeton rufescens var. rivularis Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 841 (1823)

= Potamogeton rufescens var. spathulatus (T.Marsson) Rouy; Fl. France [Rouy & Foucaud] 13: 309 (1912)

= Potamogeton semipellucidus var. alpinus (Balb.) Fiek; Fl. Schlesien [Fiek] 420 (1881), nom. illeg.

= Potamogeton semipellucidus W.D.J.Koch & Ziz; Cat. Pl. Palat. 5, 18 (1814)

= Potamogeton stylatus Hagstr.; Bot. Not. 1908: 98 (1908)

= Potamogeton tenuifolius Raf.; Med. Repos., Ser. 3, 2: 409 (1811)

= Potamogeton tenuifolius var. subellipticus (Fernald) Fernald; Rhodora 33: 211 (1931)

= Potamogeton thomasii A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 288 (1892)

= Potamogeton ×lanceolatus subsp. rivularis (Gillot) Magnin; Bull. Soc. Bot. France 43: 441 (1897)

species :

Potamogeton amplifolius Tuck.; Amer. J. Sci. Arts 45: 38 (1843), II. 6: 225 (1848)

Name: Largeleaf pondweed (EN)

Distribution: Canada (British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Québec, Saskatchewan); USA (Alabama, Arkansas, California, Colorado, Connecticut, District of Columbia, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Tennessee, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Baja California Sur, Michoacán)

71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 78 USA 79 MEX

Synonyms: hidden

= Potamogeton amplifolius f. amphibius A.Benn.; J. Bot. 42: 70 (1904)

= Potamogeton amplifolius f. homophyllus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 163 (1916)

= Potamogeton amplifolius var. ovalifolius Morong; J. Bot. 42: 70 (1904)

= Spirillus amplifolius (Tuck.) Nieuwl.; Amer. Midl. Naturalist 3: 16 (1913)

species :

Potamogeton antaicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 105 (1916)

Distribution: Cape Verde Isl. (Santo Antao Isl., Ilha de Sao Nicolau, Ilha de Sao Tiago)

21 CVI

species :

Potamogeton australiensis A.Benn.; J. Bot. 48: 149 (1910)

Distribution: Australia (SE-South Australia, E-New South Wales, Victoria, Tasmania)

50 AUS

Synonyms: hidden

= Potamogeton membranaceus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 157 (1916)

species :

Potamogeton berchtoldii Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2 1: 277 (1838)

subspecies :

subsp. berchtoldii

Name: Berchtold-Laichkraut (DE), Small Pondweed (EN)

Distribution: Iceland; Faeroe Isl.; England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; ?Liechtenstein; Austria; Poland; Czech Republic; ?Slovakia; Hungary; Spain; Andorra; France; Channel Isl. (Alderney); Corsica; Sardinia; Italy; Malta; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; Albania; Romania; Bulgaria; Greece (very rare mainland); Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Crimea; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Magadan, Primorye, Sakhalin); Turkmenistan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, NW-Anatolia: Bithynia, S-Anatolia, SE-Anatolia, SSW-Anatolia, SW-Anatolia, W-Anatolia, WN-Anatolia); Iraq (NE-Iraq, SE-Iraq: Mesopotamia); Iran (NE-Iran: Mts., Iranian Aserbaijan, W-Iran); Israel (Rift Valley); Mongolia; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Bhutan; India (Sikkim); Alaska; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming)

10 DEN FIN FOR GRB ICE IRE NOR SWE 11 AUT BGM CZE GER HUN LUX NET POL SWI 12 ADO CIS COR FRA SAR SPA 13 ALB BIH BUL CRO GRC ITA KOS MLT MNT ROM SRB 14 BLR EST KRY LAT LIT RUS UKR 30 SIB 31 RFE 32 TKM TZK 33 ARM AZE GEO NCS 34 IRN IRQ ISR TUR 37 MON 38 JAP 40 BHU IND 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA

Remarks: pusillus agg.

Synonyms: hidden

= Potamogeton berchtoldii f. ramosissimus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 277 (1838)

= Potamogeton berchtoldii f. simplex Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 277 (1838)

= Potamogeton berchtoldii subsp. tenuissimus (Mert. & W.D.J.Koch) Calder & Roy L.Taylor; Canad. J. Bot. 43: 1388 (1965)

= Potamogeton berchtoldii var. acuminatus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 278 (1838), nom. superfl.

= Potamogeton berchtoldii var. colpophilus (Fernald) Fernald; Rhodora 42: 246 (1940)

= Potamogeton berchtoldii var. lacunatus (Hagstr.) Fernald; Rhodora 42: 246 (1940)

= Potamogeton berchtoldii var. major Nakai; Bull. Natl. Sci. Mus. Tokyo 31: 123 (1952)

= Potamogeton berchtoldii var. mucronatus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 277 (1838)

= Potamogeton berchtoldii var. polyphyllus (Morong) Fernald; Rhodora 42: 246 (1940)

= Potamogeton berchtoldii var. tenuissimus (Mert. & W.D.J.Koch) Fernald; Rhodora 42: 246 (1940)

= Potamogeton fieberi Rouy; Fl. France [Rouy & Foucaud] 13: 321 (1912)

= Potamogeton lacunatus f. novae-angliae Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 121 (1916)

= Potamogeton lacunatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 120 (1916)

= Potamogeton polyphyllus var. acuminatus (Fieber) Graebn.

= Potamogeton pusillus proles berchtoldii (Fieber) Rouy; Fl. France [Rouy & Foucaud] 13: 321 (1912)

= Potamogeton pusillus f. brevirostris Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 124 (1916)

= Potamogeton pusillus f. pygmaeus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 124 (1916)

= Potamogeton pusillus f. tenuissimus (Mert. & W.D.J.Koch) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 122 (1916)

= Potamogeton pusillus subsp. tenuissimus (Mert. & W.D.J.Koch) Haynes & Hellq.; Novon 6: 370 (1996)

= Potamogeton pusillus subsp. tenuissimus (Mert. & W.D.J.Koch) K.Richt.; Pl. Eur. [K.Richter] 1: 15 (1890)

= Potamogeton pusillus subsp. tenuissimus (Mert. & W.D.J.Koch) Schübl. & G.Martens; Fl. Würtemberg 112 (1834)

= Potamogeton pusillus subvar. elongatus (A.Benn.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 345 (1897)

= Potamogeton pusillus subvar. pauciflorus (Schur) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 346 (1897)

= Potamogeton pusillus var. angustissimus Wallr.; Sched. Crit. 68 (1822)

= Potamogeton pusillus var. berchtoldii (Fieber) Nyman; Consp. Fl. Eur. 683 (1882)

= Potamogeton pusillus var. colpophilus Fernald; Mem. Amer. Acad. Arts, n. s. 17: 90 (1932)

= Potamogeton pusillus var. elongatus A.Benn.; J. Bot. 29(341): 151 (1891)

= Potamogeton pusillus var. macrocarpus Rouy; Fl. France [Rouy & Foucaud] 13: 322 (1912)

= Potamogeton pusillus var. microcarpus Rouy; Fl. France [Rouy & Foucaud] 13: 322 (1912)

= Potamogeton pusillus var. minutissimus Mert. & W.D.J.Koch ex Merino; Fl. Galicia [Merino] 3: 420 (1909)

= Potamogeton pusillus var. mucronatus (Fieber) Graebn.

= Potamogeton pusillus var. polyphyllus Morong; Bot. Gaz. 5: 51 (1880)

= Potamogeton pusillus var. tenuissimus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 857 (1823)

= Potamogeton tenuissimus (Mert. & W.D.J.Koch) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 14 (1845)

subspecies :

subsp. clystocarpus (Fernald) Les & Tippery; Syst. Bot. 34(4): 650 (2009)

Name: Little aguja pondweed

Distribution: USA (W-Texas)

77 USA

Conservation Status: extremely limited, known from only one canyon. Of conservation concern

Synonyms: hidden

= Potamogeton clystocarpus Fernald; Mem. Amer. Acad. Arts, n. s. 17: 79 (1932)

subspecies :

subsp. gemmiparus (J.W.Robbins) Les & Tippery; Syst. Bot. 34(4): 650 (2009)

Name: Small pondweed

Distribution: Canada (Québec); USA (Connecticut, Massachusetts, Maine, New Hampshire, Rhode Island, Vermont)

72 CDN 75 USA

Synonyms: hidden

= Potamogeton gemmiparus (J.W.Robbins) Morong; Bot. Gaz. 5: 51 (1880)

= Potamogeton pusillus subsp. gemmiparus (J.W.Robbins) Haynes & Hellq.; Novon 6: 370 (1996)

= Potamogeton pusillus var. gemmiparus J.W.Robbins; Manual [A.Gray] ed. 5: 489 (1867)

species :

Potamogeton bicupulatus Fernald; Mem. Amer. Acad. Arts, n. s. 17: 112 (1932)

Name: Snailseed pondweed

Distribution: Canada (Ontario); USA (Connecticut, Delaware, Indiana, Massachusetts, Maine, Michigan, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Virginia, Vermont, Wisconsin)

72 CDN 74 USA 75 USA 78 USA

Synonyms: hidden

= Potamogeton dimorphus Raf.; Amer. Monthly Mag. & Crit. Rev. 1: 358 (1817), nom. rej.

= Potamogeton diversifolius var. trichophyllus Morong; Mem. Torrey Bot. Club 3(2): 49 (1893)

= Potamogeton diversifolius W.P.C.Barton; Fl. Philadelph. Prodr. 27 (1815), nom. illeg.

= Potamogeton hybridus var. trichophyllus (Morong) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 51 (1907)

species :

Potamogeton biformis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 247 (1916)

Distribution: Siberia (W-Siberia)

30 SIB

species :

Potamogeton chamissoi A.Benn.; J. Bot. 44: 74 (1904)

Distribution: Mauritius

29 MAU

species :

Potamogeton cheesemanii A.Benn.; J. Bot. 21: 66 (1883)

Distribution: Australia (South Australia, Tasmania); New Zealand (incl. Stewart Isl.); Chatham Isl.

50 AUS 51 CTM NZL

Synonyms: hidden

= Potamogeton cheesemanii f. tasmanicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 174 (1916)

= Potamogeton porrigens Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 172 (1916)

= Potamogeton sessilifolius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 167 (1916)

species :

Potamogeton coloratus Hornem.; Fl. Dan. [Oeder et al.] 9(25): 4 (1813)

Name: Gefärbtes Laichkraut (DE), Fen Pondweed (EN)

Distribution: England (England, Wales, Scotland, Outer Hebrides); Ireland (Ireland, Northern Ireland); Denmark; Sweden; Netherlands; Belgium; Germany (+Baden-Württemberg, Bayern, +Hessen, +Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, +Sachsen-Anhalt); Switzerland; Austria; Poland; Czech Republic; Hungary; Spain; Baleares; France; +Channel Isl. (+Guernsey); Corsica; Sardinia; Italy; Sicily; Slovenia; Croatia; Albania; Romania; W-Greece (W-Epirus, Kerkyra); Morocco; Algeria; Azerbaijan (Talysh); Turkey (SW-Anatolia); Saudi Arabia (Asir)

10 DEN GRB IRE SWE 11 AUT BGM CZE GER HUN NET POL SWI 12 BAL CIS COR FRA SAR SPA 13 ALB CRO GRC ITA ROM SIC SLV 20 ALG MOR 33 AZE 34 TUR 35 SAU

Synonyms: hidden

= Buccaferrea hornemannii (G.Mey.) Bubani; Nuovo Giorn. Bot. Ital. 5: 316 (1873), nom. illeg.

= Potamogeton alpinus subsp. subflavus (Loret & Barrandon) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 74 (1907)

= Potamogeton coloratus f. rotundifolius (Mert. & W.D.J.Koch) E.Baumann; Arch. Hydrobiol. Planktonk., Suppl. 1(Veg. Untersees): 92 (1911)

= Potamogeton coloratus f. terrestris (Tiselius) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 179 (1916)

= Potamogeton coloratus subsp. subflavus (Loret & Barrandon) Nyman; Consp. Fl. Eur. Suppl. 2: 287 (1890)

= Potamogeton coloratus subsp. subflavus (Loret & Barrandon) O.Bolòs & Vigo; Fl. Man. Països Catalans 4: 38 (2001), isonym

= Potamogeton coloratus var. helodes (Dumort.) A.Benn.; J. Bot. 32: 203 (1894)

= Potamogeton coloratus var. jamaicensis Griseb.; Fl. Brit. W. I. [Grisebach] 506 (1859)

= Potamogeton coloratus var. natans Rouy; Fl. France [Rouy & Foucaud] 13: 307 (1912)

= Potamogeton coloratus var. siculus Nyman; Consp. Fl. Eur. 682 (1882)

= Potamogeton helodes Dumort.; Fl. Belg. [Dumortier] 163 (1827)

= Potamogeton hornemannii G.Mey.; Chloris Han. 521 (1836), nom. illeg.

= Potamogeton natans subsp. plantagineus (Ducroz ex Roem. & Schult.) Hook.f.; Student´s Fl. Brit. Isl. 371 (1870)

= Potamogeton natans var. coloratus (Hornem.) Fiori & Paol.; Fl. Anal. Italia 1: 154 (1896)

= Potamogeton plantagineus Du Croz ex Roem. & Schult.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 504 (1818)

= Potamogeton plantagineus f. terrestris Tiselius; Potamog. Suec. Exs. 1: no. 8 (1894)

= Potamogeton plantagineus f. terrestris Tiselius ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 179 (1917)

= Potamogeton plantagineus var. intermedius Gaudin; Fl. Helv. 1: 471 (1828)

= Potamogeton plantagineus var. jamaicensis Griseb.; Fl. Brit. W. I. [Grisebach] 506 (1859)

= Potamogeton plantagineus var. minor Gaudin; Fl. Helv. 1: 471 (1828)

= Potamogeton plantagineus var. rotundifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 843 (1823)

= Potamogeton polygonifolius subsp. coloratus (Hornem.) Gosselman; Blekinges Fl. [Holmgren] 29 (1865)

= Potamogeton rufescens subsp. helodes (Dumort.) K.Richt.; Pl. Eur. [K.Richter] 1: 12 (1890)

= Potamogeton siculus proles subflavus (Loret & Barrandon) Rouy; Fl. France [Rouy & Foucaud] 13: 308 (1912)

= Potamogeton siculus subsp. subflavus (Loret & Barrandon) P.Fourn.; Quatre Fl. France 141 (1935)

= Potamogeton siculus Tineo ex Guss.; Fl. Sicul. Syn. 2: 790 (1844), nom. illeg.

= Potamogeton subflavus Loret & Barrandon; Fl. Montpellier 671 (1876)

species :

Potamogeton compressus L.; Sp. Pl. [Linnaeus] 1: 127 (1753)

Name: Flachstängliges Laichkraut (DE), Grass-wrack Pondweed (EN)

Distribution: England (C- & E-England, Wales); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Germany (Brandenburg, +Berlin, Bayern, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Schleswig-Holstein, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; France; Slovenia; Croatia; Montenegro; Romania; ?Greece (?Peloponnisos); Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Primorye, Sakhalin); Kazakhstan; China (NE-China); Mongolia; Japan (Hokkaido)

10 DEN FIN GRB NOR SWE 11 AUT BGM CZE GER NET POL SWI 12 FRA 13 CRO MNT ROM SLV 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ 36 CHI 37 MON 38 JAP

Synonyms: hidden

= Potamogeton acutifolius f. major (Fieber) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 17 (1845)

= Potamogeton acutifolius Hornem.; Fl. Dan. [Oeder et al.] t. 2046 (1832), nom. illeg.

= Potamogeton complanatus Willd.; Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 3: 297 (1809)

= Potamogeton compressus var. acutus Schltdl.; Fl. Berol. [Schlechtendal] 1: 117 (1823)

= Potamogeton compressus var. dimidius Crép.; Notes Pl. Rar. Belgique 4: 44 (1864)

= Potamogeton compressus var. obtusus Schltdl.; Fl. Berol. [Schlechtendal] 1: 117 (1823)

= Potamogeton crispus var. major Gray; Nat. Arr. Brit. Pl. 2: 35 (1821 publ. 1822)

= Potamogeton crispus var. oppositifolius Gray; Nat. Arr. Brit. Pl. 2: 35 (1821 publ. 1822)

= Potamogeton cuspidatus Schrad.; Engl. Fl. 1: 234 (1824)

= Potamogeton monoginus Miki; Stud. Hist. Nat. Monuments Kyohotu 18: 44 (1937), no Latin descr.

= Potamogeton pusillus var. compressus (L.) Macreight; Man. Brit. Bot. [Macreight] 224 (1837)

= Potamogeton reflexus A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 291 (1892)

= Potamogeton zosterifolius f. magnus Tiselius; Potamog. Suec. Exs. 2: no. 97 (1895)

= Potamogeton zosterifolius f. selenocarpus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 67 (1916)

= Potamogeton zosterifolius Schumach.; Enum. Pl. Saelland. 1: 50 (1801)

= Potamogeton zosterophyllus Dumort.; Fl. Belg. [Dumortier] 164 (1827)

= Spirillus zosterifolius (Schumach.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton confervoides Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 13 (1845)

Name: Tuckerman´s pondweed

Distribution: Canada (Labrador, New Brunswick, Newfoundland, Nova Scotia, Ontario, Québec); St. Pierre et Miquelon; USA (Connecticut, Massachusetts, Maine, Michigan, North Carolina, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, South Carolina, Vermont, Wisconsin)

72 CDN SPM 74 USA 75 USA 78 USA

Synonyms: hidden

= Potamogeton trichoides Tuck.; Amer. J. Sci. Arts, Ser. 2, 7: 358 (1849)

= Potamogeton tuckermanii J.W.Robbins; Manual [A. Gray], ed. 2: 434 (1856)

species :

Potamogeton crispus L.; Sp. Pl. [Linnaeus] 1: 126 (1753)

Name: Krauses Laichkraut (DE), Curled Pondweed (EN)

Distribution: England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl., Isles of Scilly); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Liechtenstein; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; Baleares; France; Channel Isl. (Guernsey, Jersey); Corsica; Sardinia; Italy; Sicily; Malta; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; North Macedonia; Albania; Romania; Bulgaria; European Turkey; Greece (scattered N-Greece, rare Kerkyra, C-Greece, Peloponnisos); Estonia; Latvia; Lithuania; Belarus; European Russia (C-European Russia, E-European Russia, W-European Russia); Ukraine; Crimea; Algeria; Libya; Egypt (Desert Oases, Eastern Desert, NE-Egypt, Nile Delta, Nile Valley, NW-coastal Egypt, SE-Egypt); Sudan; Ethiopia; ?Zambia; ?Malawi; Zimbabwe; Namibia; Botswana; South Africa (Limpopo, North-West Prov., Gauteng, Free State, KwaZulu-Natal, E-Cape Prov.); Eswatini [Swaziland]; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia); Russian Far East (Primorye, Sakhalin); Kazakhstan; Turkmenistan; Uzbekistan; Kyrgyzstan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, NW-Anatolia: Bithynia, S-Anatolia, SSW-Anatolia, W-Anatolia, WN-Anatolia); Iraq (SE-Iraq: Mesopotamia); Iran (N-Iran, W-Iran); Afghanistan (Kabul, Qunduz); Lebanon (C-Lebanon); Syria (C-Syrian Desert, Jazira, NW-Syria); Israel (coastal W-Israel, N-Israel); China (widespread); Mongolia; North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Ryukyu Isl.; Taiwan; Pakistan; Nepal; Bhutan; India (almost throughout); Bangladesh; Myanmar; Thailand; Laos; Cambodia; Vietnam; Sumatra; Australia (Western Australia, Northern Territory, South Australia, Queensland, New South Wales, Victoria, Tasmania); New Zealand [I]; Fiji [I]; Canada [I] (Alberta [I], British Columbia [I], Ontario [I], Québec [I], Saskatchewan [I]); USA [I] (Alabama [I], Arkansas [I], Arizona [I], California [I], Colorado [I], Connecticut [I], District of Columbia [I], Delaware [I], Florida [I], Georgia [I], Iowa [I], Idaho [I], Illinois [I], Indiana [I], Kansas [I], Kentucky [I], Louisiana [I], Massachusetts [I], Maryland [I], Michigan [I], Minnesota [I], Missouri [I], Mississippi [I], Montana [I], North Carolina [I], North Dakota [I], Nebraska [I], New Hampshire [I], New Jersey [I], New Mexico [I], Nevada [I], New York [I], Ohio [I], Oklahoma [I], Oregon [I], Pennsylvania [I], Rhode Island [I], South Dakota [I], Tennessee [I], Texas [I], Utah [I], Virginia [I], Vermont [I], Washington State [I], Wisconsin [I], West Virginia [I], Wyoming [I]); Mexico [I]; Costa Rica [I]; Cuba [I]; Colombia [I]; Argentina [I]

10 DEN FIN GRB IRE NOR SWE 11 AUT BGM CZE GER HUN LIE LUX NET POL SLO SWI 12 BAL CIS COR FRA POR SAR SPA 13 ALB BIH BUL CRO GRC ITA KOS MLT MNT NMA ROM SIC SLV SRB TUE 14 BLR EST KRY LAT LIT RUS UKR 20 ALG EGY LBY 24 ETH SUD 26 ZIM 27 BOT NAM SAF SWZ 30 SIB 31 RFE 32 KAZ KGZ TKM TZK UZB 33 ARM AZE GEO NCS 34 AFG IRN IRQ ISR LEB SYR TUR 36 CHI 37 MON 38 JAP KOR NKO NNS TAI 40 BAN BHU IND NEP PAK 41 CBD LAO MYA THA VIE 42 SUM 50 AUS 51 nzl 60 fij 71 cdn 72 cdn 73 usa 74 usa 75 usa 76 usa 77 usa 78 usa 79 mex 80 cos 81 cub 82 clm 85 arg

Synonyms: hidden

= Buccaferrea crispata (Tragus ex L.) Bubani; Fl. Pyren. [Bubani] 4: 13 (1902)

= Potamogeton austriacus Gand.; Oesterr. Bot. Z. 31: 44 (1881)

= Potamogeton concinnitus A.Benn.; J. Bot. 46: 162 (1908)

= Potamogeton crenulatus D.Don; Prodr. Fl. Nepal. 22 (1825)

= Potamogeton crispatus Wallman ex Rchb.; Fl. Germ. Excurs. 8 (1830)

= Potamogeton crispus f. angustifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 269 (1838)

= Potamogeton crispus f. gemmifer Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 18 (1845)

= Potamogeton crispus f. latifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 269 (1838)

= Potamogeton crispus f. longifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 269 (1838)

= Potamogeton crispus f. serrulatus (Opiz) Schrad. ex Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 18 (1845)

= Potamogeton crispus subsp. angustifolius Gaudin; Fl. Helv. 1: 476 (1828)

= Potamogeton crispus var. acutifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 269 (1838)

= Potamogeton crispus var. alatus Zapal.; Rozpr. Wydz. Mat.-Przyr. Akad. Umiejetn., Dzial B, Nauki Biol., Ser. 3, 6B(46B): 248 (1906)

= Potamogeton crispus var. crispatus (Wallman) Rchb.; Fl. Germ. Excurs. 3 (Clav. Enum. Gen.): I (1833)

= Potamogeton crispus var. gemmifer Hausm.; Fl. Tirol [Hausmann] 2: 822 (1852)

= Potamogeton crispus var. gemmifer Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 18 (1845)

= Potamogeton crispus var. laevis Merino; Anales Soc. Esp. Hist. Nat. 30: 171 (1901)

= Potamogeton crispus var. macrorrhynchus (Gand.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 336 (1897)

= Potamogeton crispus var. najadoides Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 100 (1907)

= Potamogeton crispus var. obtusifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 269 (1838)

= Potamogeton crispus var. phialiensis Post; Bull. Herb. Boissier 1: 409 (1893)

= Potamogeton crispus var. planifolius G.Mey.; Chloris Han. 523 (1836)

= Potamogeton crispus var. planifolius Klett & Richt.; Fl. Leipzig 162 (1830)

= Potamogeton crispus var. serratus Gray; Nat. Arr. Brit. Pl. 2: 34 (1821 publ. 1822)

= Potamogeton crispus var. serrulatus (Schrad.) Asch.; Fl. Brandenburg 1(2): 662 (1864), isonym

= Potamogeton crispus var. serrulatus Schrad. ex Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 18 (1845)

= Potamogeton crispus var. sinuatus Fr.; Novit. Fl. Suec. Alt. 43 (1828)

= Potamogeton hohenackeri Gand.; Oesterr. Bot. Z. 31: 43 (1881)

= Potamogeton hungaricus Gand.; Oesterr. Bot. Z. 31: 43 (1881)

= Potamogeton lactucaceum Montandon; Syn. Fl. Jura, ed. 2: 305 (1868)

= Potamogeton leptophyllus Gand.; Oesterr. Bot. Z. 31: 44 (1881)

= Potamogeton macrorrhynchus Gand.; Oesterr. Bot. Z. 31: 44 (1881)

= Potamogeton notarisii Gand.; Oesterr. Bot. Z. 31: 44 (1881)

= Potamogeton pallidior Gand.; Oesterr. Bot. Z. 31: 43 (1881)

= Potamogeton rubricans Gand.; Oesterr. Bot. Z. 31: 43 (1881)

= Potamogeton rubrinaevus Gand.; Oesterr. Bot. Z. 31: 44 (1881)

= Potamogeton serrulatus Opiz; Flora 5: 267 (1822)

= Potamogeton tuberosus Roxb.; (Hort. Bengal. 12 (1814), nomen), Fl. Ind. [Roxburgh] 1: 472 (1820)

species :

Potamogeton cristatus Regel & Maack; Tent. Fl. Ussur. 153, t. 10, f. 3-6 (1861)

Distribution: Russian Far East (Khabarovsk, Primorye); China (NE-China, Hebei, Jiangsu, Jiangxi, Fujian, Henan, Hubei, Hunan, Sichuan, Zhejiang); North Korea; South Korea; Japan (Honshu); Ryukyu Isl.; Taiwan

31 RFE 36 CHI 38 JAP KOR NKO NNS TAI

Remarks: octandrus agg.

Synonyms: hidden

= Potamogeton iwatensis Makino; J. Jap. Bot. 7: 15 (1931)

species :

Potamogeton delavayi A.Benn.; J. Bot. 30: 228 (1892)

Distribution: China (Yunnan)

36 CHI

species :

Potamogeton dentatus Hagstr.; Bot. Not. 101 (1908)

Distribution: Japan (Honshu, Kyushu)

38 JAP

Synonyms: hidden

= Potamogeton teganumensis (Makino) Makino; Bot. Mag. (Tokyo) 26: 122 (1912)

= Potamogeton lucens var. teganumensis Makino; Bot. Mag. (Tokyo) 19: 142 (1905)

species :

Potamogeton distinctus A.Benn.; J. Bot. 42(9): 72-73 (1904)

Distribution: Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Primorye); China (widespread); Tibet; North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Ryukyu Isl.; Taiwan; Nepal; Bhutan; India (Arunachal Pradesh); Thailand; Vietnam; peninsular Malaysia; Sumatra; Philippines (Luzon); Java; Lesser Sunda Isl.; Lesser Sunda Isl. (Flores); New Guinea (Papua New Guinea)

31 RFE 36 CHI TIB 38 JAP KOR NKO NNS TAI 40 BHU IND NEP 41 THA VIE 42 JAW LSI MLY NWG PHI SUM

Synonyms: hidden

= Potamogeton alatus Koidz.; Bot. Mag. (Tokyo) 43: 397 (1929)

= Potamogeton digynus Wall.; Numer. List [Wallich] no. 5177 (1831), nomen

= Potamogeton distinctus var. lishuiensis M.R.Zhu & W.Y.Xie; J. Hangzhou Univ., Nat. Sci. Ed. 17: 2 (2018)

= Potamogeton distinctus var. tonkinensis (E.G.Camus) V.C.Vu ex Aver.; Konsp. Sosud. Rast. Fl. V´etnama 2: 155 (1996)

= Potamogeton fontigenus Y.H.Guo, S.C.Sun & H.Q.Wang; Bull. Bot. Lab. N. E. Forest. Inst., Harbin 5(2): 133 (1985)

= Potamogeton franchetii A.Benn. & Baagøe; J. Bot. 45(6): 234-235 (1907)

= Potamogeton longipetiolatus E.G.Camus; Notul. Syst. (Paris) 1: 88 (1909)

= Potamogeton malaianus var. tenuior Miq.; Ill. Fl. Archip. Ind. 47 (1870)

= Potamogeton natans f. indicus Miq.; Fl. Ned. Ind., Eerste Bijv. 597 (1861)

= Potamogeton perversus A.Benn.; Philipp. J. Sci., C 9: 343 (1914)

= Potamogeton tonkinensis E.G.Camus; Notul. Syst. (Paris) 1: 86 (1909)

species :

Potamogeton diversifolius Raf.; Med. Repos. 5: 354 (1808)

Name: Waterthread pondweed

Distribution: USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, Vermont, Wisconsin, West Virginia, Wyoming); Mexico (Aguascalientes, Chihuahua, Coahuila, Guanajuato, Jalisco, Michoacán, Nayarit, Queretaro, San Luis Potosi, Sonora, Zacatecas); Cuba

73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX 81 CUB

Synonyms: hidden

= Potamogeton capillaceus Poir.; Encycl. [J.Lamarck et al.], Suppl. 4: 535 (1816)

= Potamogeton capillaceus var. atripes Fernald; Rhodora 39: 380 (1937)

= Potamogeton conjungens Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 138 (1916)

= Potamogeton dimorphoides Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 263 (1916)

= Potamogeton diversifolius f. limosus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 139 (1916)

= Potamogeton diversifolius var. capitatus Engelm.; Amer. J. Sci. Arts 46: 102 (1844)

= Potamogeton diversifolius var. multidenticulatus Morong; Mem. Torrey Bot. Club 3(2): 48 (1893)

= Potamogeton diversifolius var. spicatus Engelm.; Amer. J. Sci. Arts 46: 102 (1844)

= Potamogeton hybridus var. multidenticulatus (Morong) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 51 (1907)

= Potamogeton hybridus var. spicatus (Engelm.) J.W.Robbins; Manual [A.Gray] ed. 2: 434 (1856)

= Potamogeton porcatus Muhl.; Cat. Pl. Amer. Sept. 3 (1813), nom. subnud.

= Potamogeton zetterstedtii Wallman; Bot. Zeitung (Berlin) 1: 256 (1843)

= Spirillus diversifolius (Raf.) Nieuwl.; Amer. Midl. Naturalist 3: 18 (1913)

species :

Potamogeton drummondii Benth.; Fl. Austral. [Bentham] 7: 171 (1878)

Distribution: Australia (Western Australia, South Australia, Victoria, Tasmania)

50 AUS

Synonyms: hidden

= Potamogeton reduncus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 172 (1916)

species :

Potamogeton epihydrus Raf.; Med. Repos., Ser. 2, 5: 354 (1808)

Name: Ribbonleaf Pondweed, American Pondweed (EN)

Distribution: England (N-England [I], Outer Hebrides); Alaska; Canada (British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isl., Québec, Saskatchewan); St. Pierre et Miquelon; USA (Alabama, Arkansas, California, Colorado, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, New Hampshire, New Jersey, Nevada, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming)

10 GRB 70 ASK 71 CDN 72 CDN SPM 73 USA 74 USA 75 USA 76 USA 78 USA

Synonyms: hidden

= Potamogeton cayugensis (Wiegand) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 140 (1916)

= Potamogeton claytonii Tuck.; Amer. J. Sci. Arts 45: 38 (1843)

= Potamogeton epihydrus subsp. nuttallii (Cham. & Schltdl.) Calder & Roy L.Taylor; Canad. J. Bot. 43: 1388 (1965)

= Potamogeton epihydrus var. cayugensis A.Benn.; J. Bot. 42: 69 (1904)

= Potamogeton epihydrus var. nuttallii (Cham. & Schltdl.) Fernald; Mem. Gray Herb. 3: 115 (1932)

= Potamogeton epihydrus var. ramosus (Peck) House; Bull. New York State Mus. Nat. Hist. 254: 52 (1924)

= Potamogeton nuttallii Cham. & Schltdl.; Linnaea 2: 226 (1827)

= Potamogeton nuttallii var. cayugensis Wiegand; Rhodora 2: 102 (1900)

= Potamogeton nuttallii var. ramosus Peck; Rep. (Annual) Regents Univ. State New York New York State Mus. 47(Repr. 3): 162 (1894)

= Potamogeton pensylvanicus Willd. ex Cham. & Schltdl.; Linnaea 2: 227 (1827)

= Potamogeton pumilus Wolfg. ex Schult.; Mant. 3 [Schultes]: 354 (1827)

species :

Potamogeton ferrugineus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 161 (1916)

Distribution: Colombia (Cundinamarca); Peru; NE-Brazil (Ceara); S-Brazil (Rio Grande do Sul, Santa Catarina); Uruguay (Colonia, Florida Prov., Rocha); Argentina (Buenos Aires, Cordoba, Corrientes, Entre Rios, Rio Negro, Santa Cruz, San Luis, Tucuman); Chile (Aisén)

82 CLM 83 PER 84 BRA 85 ARG CLE URU

Synonyms: hidden

= Potamogeton apicalis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 156 (1916)

= Potamogeton illinoensis var. ventanicola (Hicken) Horn; Colecç. Ci. Inst. Nac. Tecnol. Agropecu 1: 281 (1969)

= Potamogeton lucens var. ventanicola Hicken; Anales Soc. Ci. Argent. 65: 294 (1908)

= Potamogeton spoliatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 168 (1916)

species :

Potamogeton floridanus Small; Fl. S.E. U.S. [Small] 37 (1903)

Name: Florida pondweed (EN)

Distribution: USA (NW-Florida)

78 USA

Conservation Status: Of conservation concern

species :

Potamogeton foliosus Raf.; Med. Repos., Ser. 2, 5: 354 (1808)

subspecies :

subsp. foliosus

Name: Leafy Pondweed (EN)

Distribution: Hawaii (Kauai, Oahu, Maui, Hawaii Isl.); Alaska; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Aguascalientes, Baja California Norte, Baja California Sur, Chihuahua, Colima, Ciudad de Mexico, Durango, Guanajuato, Guerrero, Hidalgo, Jalisco, Mexico State, Michoacán, Morelos, Oaxaca, Puebla, Queretaro, San Luis Potosi, Sonora, Tabasco, Tamaulipas, Veracruz, Zacatecas); Guatemala; Cuba; Jamaica; Hispaniola; Puerto Rico; Virgin Isl. (St. Croix, St. Thomas)

63 HAW 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX 80 GUA 81 CUB HIS JAM PUE VIR

Synonyms: hidden

= Potamogeton californicus (Morong) Piper; Contr. U.S. Natl. Herb. 11: 98 (1906)

= Potamogeton curtisii Morong; Bull. Torrey Bot. Club 13: 145 (1886)

= Potamogeton exstipulatus Muhl.; Cat. Pl. Amer. Sept. 18 (1813)

= Potamogeton foliosus f. californicus (Morong) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 91 (1916)

= Potamogeton foliosus f. niagarensis (Tuck.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 91 (1916)

= Potamogeton foliosus var. californicus (Morong) Morong; Mem. Torrey Bot. Club 3: 40 (1893)

= Potamogeton foliosus var. macellus Fernald; Mem. Gray Herb. 3: 46 (1932)

= Potamogeton foliosus var. niagarensis (Tuck.) Morong; Mem. Torrey Bot. Club 3: 39 (1893)

= Potamogeton gramineus Michx.; Fl. Bor.-Amer. [Michaux] 1: 102 (1803), nom. illeg., non L.

= Potamogeton niagarensis Tuck.; Amer. J. Sci. Arts, Ser. 2, 7: 354 (1849)

= Potamogeton pauciflorus Pursh; Fl. Amer. Sept. [Pursh] 1: 121 (1813), nom. illeg.

= Potamogeton pauciflorus var. californicus Morong; Bot. Gaz. 10: 254 (1885)

= Potamogeton pauciflorus var. niagarensis (Tuck.) A.Gray; Manual [A.Gray] ed. 2: 435 (1856)

= Potamogeton purshianus Morong, & MacMill.; Metasp. Minnesota Valley 39 (1892) (in syn.)

= Spirillus foliosus (Raf.) Lunell; Amer. Midl. Naturalist 4: 161 (1915)

= Spirillus foliosus var. niagarensis (Tuck.) Nieuwl.; Amer. Midl. Naturalist 3: 18 (1913)

subspecies :

subsp. fibrillosus (Fernald) Haynes & Hellq.; Novon 6: 370 (1996)

Name: Leafy pondweed

Distribution: USA (California, Idaho, Montana, Oregon, Utah, Washington State, Wyoming)

73 USA 76 USA

Synonyms: hidden

= Potamogeton fibrillosus Fernald; Mem. Amer. Acad. Arts, n. s. 17: 51 (1932)

= Potamogeton foliosus var. fibrillosus (Fernald) R.R.Haynes & Reveal; Rhodora 75(801): 76 (1973)

species :

Potamogeton friesii Rupr.; Beitr. Pflanzenk. Russ. Reiches 4: 43 (1845)

Name: Stachelspitziges Laichkraut (DE), Flat-stalked Pondweed (EN)

Distribution: England (England, E-Wales, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Germany (Brandenburg, +Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, +Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; France; Corsica; Italy; Montenegro; ?Romania; Bulgaria; Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Kamchatka, Magadan); Kazakhstan; Tajikistan; Afghanistan (Wakhan); Mongolia; Alaska; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New York, Ohio, Pennsylvania, South Dakota, Utah, Vermont, Washington State, Wisconsin, Wyoming)

10 DEN FIN GRB IRE NOR SWE 11 AUT BGM CZE GER NET POL SWI 12 COR FRA 13 BUL ITA MNT 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ TZK 34 AFG 37 MON 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA

Synonyms: hidden

= Potamogeton acutifolius J.Presl & C.Presl; Fl. Cech. 37 (1819), nom. illeg.

= Potamogeton major Morong; Mem. Torrey Bot. Club 3(2): 41 (1893)

= Potamogeton mucronatus f. acutus G.Fisch.; Veg. Untersees [Baumann] 107 (1911)

= Potamogeton mucronatus f. angustifolius (G.Fisch.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 95 (1916)

= Potamogeton mucronatus f. latifolius (R.Ruthe ex G.Fisch.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 95 (1916)

= Potamogeton mucronatus f. minor Tiselius; Potamog. Suec. Exs. 3: 101 (1897)

= Potamogeton mucronatus f. obtusior G.Fisch.; Ber. Bayer. Bot. Ges. 11: 101 (1907)

= Potamogeton mucronatus Schrad.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 517 (1818), nom. inval.

= Potamogeton mucronatus var. angustifolius G.Fisch.; Mitt. Bayer. Bot. Ges. 1(31): 377 (1904)

= Potamogeton mucronatus var. latifolius R.Ruthe ex G.Fisch.; Ber. Bayer. Bot. Ges. 11: 100 (1907)

= Potamogeton mucronatus var. major R.Ruthe ex G.Fisch.; Mitt. Bayer. Bot. Ges. 1(31): 377 (1904)

= Potamogeton mucronatus var. obtusior (G.Fisch.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 113 (1907)

= Potamogeton oederi G.Mey.; Fl. Hanov. Excurs. 536 (1849)

= Potamogeton pusillus subsp. friesii (Rupr.) Hook.f.; Student´s Fl. Brit. Isl., ed. 3: 435 (1884)

= Potamogeton pusillus subsp. mucronatus (Schrad. ex Sond.) Celak.; Anal. Kvet. Ceská, ed. 3: 44 (1897)

= Potamogeton pusillus var. latifolius Wigand; Fl. Kurhessen [Wigand] 299 (1859)

= Potamogeton pusillus var. major Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 857 (1823)

= Potamogeton pusillus var. mucronatus (Schrad. ex Sond.) Hook.f.; Student´s Fl. Brit. Isl. 374 (1870)

= Spirillus friesii (Rupr.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton fryeri A.Benn.; J. Bot. 45: 234 (1907)

Distribution: Russian Far East (Kamchatka, Kuril Isl., Sakhalin); South Korea; Japan (Hokkaido, Honshu, Kyushu)

31 RFE 38 JAP KOR

Synonyms: hidden

= Potamogeton subsessilifolius E.G.Camus; Notul. Syst. (Paris) 1: 86 (1909)

= Potamogeton torquatus Koidz.; Bot. Mag. (Tokyo) 43: 397 (1929)

species :

Potamogeton gayi A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 293 (1892)

Distribution: Bolivia (Santa Cruz); SE-Brazil (Minas Gerais, São Paulo); S-Brazil (Rio Grande do Sul, Santa Catarina); Paraguay (Central, Misiones); Uruguay (Durazno, Montevideo, Rocha, San Jose, Tacuarembo); Argentina (Buenos Aires, Corrientes, Entre Rios, Formosa, Jujuy, La Rioja, Santa Fe); Chile (Araucania)

83 BOL 84 BRA 85 ARG CLE PAR URU

Synonyms: hidden

= Potamogeton burkartii Horn; Fl. Prov. Buenos Aires, Pt. 1, Pteridophyt., Gymnosperm. & Monocot., 287 (1969) (in adnot.)

species :

Potamogeton gramineus L.; Sp. Pl. [Linnaeus] 1: 127 (1753)

Name: Gras-Laichkraut (DE), Various-leaved Pondweed (EN)

Distribution: Iceland; Faeroe Isl.; England (N- & E-England, Wales, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; France; ?Corsica; Italy; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; Albania; Romania; Bulgaria; European Turkey; Greece (rare mainland, Kerkyra); Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Magadan, Primorye, Sakhalin); Kazakhstan; Uzbekistan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (Inner Anatolia, N-Anatolia, NE-Anatolia, SE-Anatolia); Iran (Iranian Aserbaijan); China (Heilongjiang, Jilin, Liaoning, Shaanxi, Heilongjiang, Jilin, Liaoning, Xinjiang, Yunnan); Tibet; Mongolia; North Korea; South Korea; Japan (Hokkaido, Honshu); Pakistan; India (Meghalaya, Jammu & Kashmir); Alaska; Greenland; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); St. Pierre et Miquelon; USA (Arizona, California, Colorado, Connecticut, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, Washington State, Wisconsin, West Virginia, Wyoming)

10 DEN FIN FOR GRB ICE IRE NOR SWE 11 AUT BGM CZE GER HUN NET POL SLO SWI 12 FRA POR SPA 13 ALB BIH BUL CRO GRC ITA KOS MNT ROM SLV SRB TUE 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ TZK UZB 33 ARM AZE GEO NCS 34 IRN TUR 36 CHI TIB 37 MON 38 JAP KOR NKO 40 IND PAK 70 ASK CDN GNL 71 CDN 72 CDN SPM 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA

Synonyms: hidden

= Buccaferrea variifolia Ray ex Bubani; Fl. Pyren. [Bubani] 4: 12 (1902), nom. illeg.

= Potamogeton argutulus f. puyensis Hagstr.; Bot. Not. 1908: 107 (1908)

= Potamogeton augustani Bellardi; Mem. Acad. Sci. Turin, Sci. Phys. 10-11: 448 (1802 publ. 1803), in nota

= Potamogeton augustanus Balb.; Misc. Bot. [Balbis] 14, t. 3 (1803)

= Potamogeton biformoides Papch.; Bot. Zhurn. (Moscow & Leningrad) 82(12): 69 (1997)

= Potamogeton borealis Kihlm.; Bot. Not. 1887: 84 (1887), nom. illeg.

= Potamogeton crassipes Kit. ex Cham. & Schltdl.; Linnaea 2: 204 (1827)

= Potamogeton delicatulus Bertol.; Misc. Bot. [Bertoloni] 15: 17 (1854)

= Potamogeton distachyus Bellardi; Mem. Acad. Sci. Turin, Sci. Phys. 10-11: 447 (1802-1803), in nota

= Potamogeton falcatus Fryer; J. Bot. 27: 65 (1889)

= Potamogeton gracilis Wolfg.; Mant. 3 [Schultes & Schultes f.]: 355 (1827)

= Potamogeton gramineus f. amphibius (Fr.) E.Baumann; Arch. Hydrobiol. Planktonk., Suppl. 1(Veg. Untersees): 99 (1911)

= Potamogeton gramineus f. angermanicus Tiselius; Potamog. Suec. Exs. 1: no. 24 (1894)

= Potamogeton gramineus f. angustifolius Tiselius ex Hagstr.; Sver. Fl. 796 (1901)

= Potamogeton gramineus f. fluctuans (Tiselius ex Fryer) Hagstr.; Sver. Fl. 796 (1901)

= Potamogeton gramineus f. hybridus (Petagna) Asch.; Fl. Brandenburg 1(2): 661 (1864)

= Potamogeton gramineus f. jemtlandicus Tiselius; Potamog. Suec. Exs. 1: no. 23 (1894)

= Potamogeton gramineus f. longipedunculatus (Mérat) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 206 (1916)

= Potamogeton gramineus f. longipedunculatus (Mérat) House; Bull. New York State Mus. Nat. Hist. 254: 53 (1924), isonym

= Potamogeton gramineus f. marinus Tiselius; Potamog. Suec. Exs. 3: no. 137 (1897)

= Potamogeton gramineus f. maximus (Morong ex A.Benn.) House; Bull. New York State Mus. Nat. Hist. 254: 54 (1924)

= Potamogeton gramineus f. myriophyllus (J.W.Robbins) House; Bull. New York State Mus. Nat. Hist. 254: 54 (1924)

= Potamogeton gramineus f. ovatifolius Tiselius; Potamog. Suec. Exs. 3: no. 138 (1897)

= Potamogeton gramineus f. riparius Fr.; Novit. Fl. Suec. Alt. 38 (1828)

= Potamogeton gramineus f. septentrionalis (Tiselius) Hagstr.; Sver. Fl. 796 (1901)

= Potamogeton gramineus f. sinuensis Tiselius; Potamog. Suec. Exs. 1: no. 21 (1894)

= Potamogeton gramineus f. stagnalis (Fr.) Hagstr.; Skand. Fl. 1: 96 (1922)

= Potamogeton gramineus f. terrestris (Fr.) D.S.Carp.; Fl. Vermont, ed. 3: 25 (1937)

= Potamogeton gramineus f. terrestris (Fr.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 206 (1916), nom. illeg.

= Potamogeton gramineus f. terrestris (G.Mey.) Asch.; Fl. Brandenburg 1(2): 661 (1864), nom. illeg.

= Potamogeton gramineus f. terrestris (Schltdl.) D.S.Carp.; Fl. Vermont, ed. 3: 25 (1937)

= Potamogeton gramineus f. terrestris Fr.; Novit. Fl. Suec. Alt. 38 (1828)

= Potamogeton gramineus f. wolfgangii (Kihlm.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 206 (1916)

= Potamogeton gramineus subsp. graminifolius (Fr.) K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton gramineus subsp. heterophyllus (Fr.) Hegi; Ill. Fl. Mitt.-Eur. [Hegi] 1: 130 (1907), isonym

= Potamogeton gramineus subsp. heterophyllus (Schreb.) K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton gramineus subsp. wolfgangii (Kihlm.) Nyman; Consp. Fl. Eur. Suppl. 2: 287 (1890)

= Potamogeton gramineus subvar. angermanicus Tiselius ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 87 (1907)

= Potamogeton gramineus subvar. angustifolius (Tiselius ex Hagstr.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 86 (1907)

= Potamogeton gramineus subvar. jemtlandicus Tiselius ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 87 (1907)

= Potamogeton gramineus subvar. marinus (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 86 (1907)

= Potamogeton gramineus subvar. septentrionalis (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 86 (1907)

= Potamogeton gramineus subvar. sinuensis Tiselis ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 88 (1907)

= Potamogeton gramineus var. amphibius Fr.; Novit. Fl. Suec. Alt. 38 (1828)

= Potamogeton gramineus var. boreale Laest.; Kongl. Vetensk. Acad. Handl. 1824: 162 (1824)

= Potamogeton gramineus var. curvifolius Laest.; Kongl. Vetensk. Acad. Handl. 1824: 162 (1824)

= Potamogeton gramineus var. debilis Tiselius; Potamog. Suec. Exs. 1: no. 33 (1894)

= Potamogeton gramineus var. elongatus (Mert. & W.D.J.Koch) Rchb.; Fl. Germ. Excurs. 138 (1832)

= Potamogeton gramineus var. fluctuans (Tiselius ex Fryer) Tiselius; Potamog. Suec. Exs. 1: no. 28-29, notulae p. 5 (1894)

= Potamogeton gramineus var. foliosus Mert. & W.D.J.Koch ex Rchb.; Fl. Germ. Excurs. 138 (1832)

= Potamogeton gramineus var. graminifolius Fr.; Novit. Fl. Suec. Alt., ed. 2: 36 (1828)

= Potamogeton gramineus var. heterophyllus (Schreb.) Fr.; Novit. Fl. Suec. Alt., ed. 2: 36 (1828)

= Potamogeton gramineus var. heterophyllus (Schreb.) Roth; Tent. Fl. Germ. 74 (1788)

= Potamogeton gramineus var. hybridus (Petagna) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 324 (1897)

= Potamogeton gramineus var. hybridus (Petagna) Asch.; Fl. Brandenburg 1(2): 661 (1864)

= Potamogeton gramineus var. lacustris Farw.; Rep. (Annual) Michigan Acad. Sci. 17: 182 (1916), nom. illeg.

= Potamogeton gramineus var. lacustris Fr.; Novit. Fl. Suec. Alt. 37 (1828)

= Potamogeton gramineus var. longipedunculatus (Mérat) Farw.; Rep. (Annual) Commiss. Parks Boulevards Detroit 11: 43 (1900)

= Potamogeton gramineus var. maximus Morong ex A.Benn.; J. Bot. 19: 241 (1881)

= Potamogeton gramineus var. minimus (Morong) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 88 (1907)

= Potamogeton gramineus var. myriophyllus Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 323 (1897)

= Potamogeton gramineus var. myriophyllus J.W.Robbins; Manual [A.Gray] ed. 5: 487 (1867)

= Potamogeton gramineus var. nigrescens (Fr.) Hagstr.; Sver. Fl. 796 (1901)

= Potamogeton gramineus var. parvifolius Farw.; Rep. (Annual) Michigan Acad. Sci. 17: 182 (1916)

= Potamogeton gramineus var. paucifolius (Opiz) Rchb.; Fl. Germ. Excurs. 138 (1832)

= Potamogeton gramineus var. platyphyllus (Rchb.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 324 (1897)

= Potamogeton gramineus var. riparius Fr.; Novit. Fl. Suec. Alt. 38 (1828)

= Potamogeton gramineus var. riparius Fr. ex Vollm.; Fl. Bayern [Vollmann] 37 (1914)

= Potamogeton gramineus var. septentrionalis Tiselius; Potamog. Suec. Exs. 1: no. 30-32, notulae p. 5 (1894)

= Potamogeton gramineus var. stagnalis Fr.; Novit. Fl. Suec. Alt. 38 (1828)

= Potamogeton gramineus var. stenophyllus G.Mey.; Chloris Han. 520 (1836)

= Potamogeton gramineus var. subnatans Wahlenb.; Fl. Lapp. [Wahlenberg] 52 (1812)

= Potamogeton gramineus var. terrestris (Fr.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 324 (1897)

= Potamogeton gramineus var. wolfgangii (Kihlm.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 206 (1916)

= Potamogeton graminifolius (Fr.) Benkö; Transsilv. 1: 123 (1778)

= Potamogeton heterophyllus f. gramineus (L.) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 24 (1845)

= Potamogeton heterophyllus f. graminifolius (Fr.) Morong; Mem. Torrey Bot. Club 3(2): 24 (1893)

= Potamogeton heterophyllus f. longipedunculatus (Mérat) Morong; Mem. Torrey Bot. Club 3: 24 (1893)

= Potamogeton heterophyllus f. maximus (Morong ex A.Benn.) Morong; Mem. Torrey Bot. Club 3: 25 (1893)

= Potamogeton heterophyllus f. minimus Morong; Mem. Torrey Bot. Club 3: 25 (1893)

= Potamogeton heterophyllus f. myriophyllus (J.W.Robbins) Morong; Mem. Torrey Bot. Club 3: 24 (1893)

= Potamogeton heterophyllus Schreb.; Spic. Fl. Lips. 21 (1771)

= Potamogeton heterophyllus Torr.; Comp. Fl. N. Middle Stat. 88 (1826), nom. illeg.

= Potamogeton heterophyllus var. fluctuans Tiselius ex Fryer; J. Bot. 28: 174 (1890)

= Potamogeton heterophyllus var. foliosus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 844 (1823)

= Potamogeton heterophyllus var. gramineus (L.) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 24 (1845)

= Potamogeton heterophyllus var. graminifolius (Fr.) S.Watson & J.M.Coult.; Manual [A.Gray] ed. 6: 561 (1890)

= Potamogeton heterophyllus var. major Morong; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 88 (1907)

= Potamogeton heterophyllus var. palustris Cham.; Adnot. Fl. Berol. [Chamisso] 5 (1815)

= Potamogeton heterophyllus var. paucifolius (Opiz) Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 844 (1823)

= Potamogeton heterophyllus var. terrestris Schltdl.; Fl. Berol. [Schlechtendal] 1: 116 (1823)

= Potamogeton hybridus Petagna; Inst. Bot. 2: 289 (1787)

= Potamogeton hybridus Thuill.; Fl. Env. Paris, éd. 2: 86 (1799), nom. illeg.

= Potamogeton lanceolatus Poir.; Encycl. [J.Lamarck et al.], Suppl. 4: 536 (1816), nom. illeg.

= Potamogeton lanciformis Roem. & Schult.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 512 (1818)

= Potamogeton latifolius Sloboda; Rostlinnictví 229 (1852)

= Potamogeton lonchites Tuck.; Amer. J. Sci. Arts, Ser. 2, 6: 226 (1848)

= Potamogeton longipedunculatus Mérat; Rev. Fl. Paris 494 (1843)

= Potamogeton nigrescens Fr.; Novit. Fl. Suec. Mant. 3: 17 (1842)

= Potamogeton oblongifolius Hook.f.; Handb. N. Zeal. Fl. 742 (1864)

= Potamogeton palustris Teesd.; Trans. Linn. Soc. London 5: 43 (1800)

= Potamogeton paucifolius Opiz; Flora 5: 266 (1822)

= Potamogeton proteus subsp. heterophyllus (Schreb.) Cham. & Schltdl.; Linnaea 2(2): 197 (1827)

= Potamogeton rufescens subsp. nigrescens (Fr.) Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton seemenii Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 335 (1897)

= Potamogeton spathiformis Tuck. ex A.Gray; Manual [A.Gray] ed. 5: 487 (1867)

= Potamogeton wolfgangii Kihlm.; Herb. Pl. Mus. Fenn. (1889) 33 et 128, et A. Benn., in Ann. Naturhist. Hofmus. Wien 7: 292 (1892)

= Potamogeton ×nitens f. merloensis (Tiselius) Hagstr.; Sver. Fl. 797 (1901)

= Potamogeton ×nitens var. merloensis Tiselius; Potamog. Suec. Exs. 1: no. 50 (1894)

= Potamogeton zizii f. elongatus (Mert. & W.D.J.Koch) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 24 (1845)

= Potamogeton zizii var. elongatus (Mert. & W.D.J.Koch) Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 264 (1838)

= Spirillus heterophyllus (Schreb.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

= Spirillus lonchites (Tuck.) Nieuwl.; Amer. Midl. Naturalist 3: 16 (1913)

species :

Potamogeton groenlandicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 127 (1916)

Name: Greenland pondweed

Distribution: Greenland

70 GNL

Conservation Status: Of conservation concern

Synonyms: hidden

= Potamogeton pusillus subsp. groenlandicus (Hagstr.) Böcher

= Potamogeton berchtoldii subsp. groenlandicus (Hagstr) Feilberg; Fl. & Fauna (Esbjerg) 101(2): 72 (1996)

species :

Potamogeton hillii Morong; Bot. Gaz. 6: 290 (1881)

Name: Hill´s pondweed

Distribution: Canada (Ontario); USA (Connecticut, Massachusetts, Michigan, New York, Ohio, Pennsylvania, Virginia, Vermont, Wisconsin)

72 CDN 74 USA 75 USA 78 USA

Synonyms: hidden

= Potamogeton porteri Fernald; Mem. Amer. Acad. Arts, n. s. 17: 73 (1932)

species :

Potamogeton hoggarensis Dandy; J. Linn. Soc., Bot. 50: 522.(1937)

Distribution: S-Algeria (Hoggar, Tassili n´Ajjer); NE-Chad (Ennedi)

20 ALG 24 CHA

Remarks: probably only a form of P. pusillus

species :

Potamogeton illinoensis Morong; Bot. Gaz. 5: 50 (1880)

Name: Illinois pondweed

Distribution: Canada (British Columbia, Manitoba, Northern Territories, Ontario, Québec); USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Baja California Norte, Baja California Sur, Campeche, Chiapas, Chihuahua, Coahuila, Ciudad de Mexico, Durango, Hidalgo, Jalisco, Mexico State, Michoacán, Morelos, Nayarit, Nuevo León, Queretaro, Quintana Roo, San Luis Potosi, Tabasco, Tamaulipas, Veracruz, Yucatan); Guatemala; Belize; El Salvador; Honduras; Nicaragua; Costa Rica; Panama; Bahamas; Cuba; Jamaica; Hispaniola; Puerto Rico; Colombia (Boyacá, Cauca, Cundinamarca, Meta, Nariño, Putumayo); Ecuador; Peru; Bolivia (Cochabamba, La Paz, Santa Cruz); N-Brazil (Amazonas); NE-Brazil (Piauí, Ceara, Bahia); WC-Brazil (Mato Grosso do Sul); SE-Brazil (São Paulo, Rio de Janeiro); S-Brazil (Paraná); Paraguay (Concepcion); Uruguay (Rocha); Argentina (Buenos Aires, Corrientes, Rio Negro); Chile (Valparaíso, Araucanía, Los Lagos, Magallanes)

70 CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX 80 BLZ COS ELS GUA HON NIC PAN 81 BAH CUB HIS JAM PUE 82 CLM 83 BOL ECU PER 84 BRA 85 ARG CLE PAR URU

Synonyms: hidden

= Potamogeton angustifolius var. connecticutensis (J.W.Robbins) A.Benn.; J. Bot. 39: 199 (1901)

= Potamogeton brasiliensis (A.Benn.) A.Benn.; J. Bot. 48: 150 (1910)

= Potamogeton curvatus A.Benn.; J. Bot. 46: 249 (1908)

= Potamogeton dunicola Tur; Darwiniana 24(1-4): 254 (1982)

= Potamogeton elipticus Larrañaga; Escritos Damaso Antonio Larrañaga 2: 68 (1923)

= Potamogeton fragillimus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 202 (1916)

= Potamogeton illinoensis f. homophyllus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 199 (1916)

= Potamogeton illinoensis f. rosulatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 199 (1916)

= Potamogeton linearis Larrañaga; Escritos Damaso Antonio Larrañaga 2: 68 (1923)

= Potamogeton lucens subsp. brasiliensis A.Benn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 79 (1907)

= Potamogeton lucens var. connecticutensis J.W.Robbins; Manual [A.Gray] ed. 5: 488 (1867)

= Potamogeton lucens var. floridanus A.Benn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 79 (1907)

= Potamogeton macrophylloides Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 202 (1916)

= Potamogeton pedersenii Tur; Darwiniana 24(1-4): 253 (1982)

= Potamogeton pulchelliformis Hagstr.; Ark. Bot. 17(7): 12 (1921)

= Potamogeton zizii var. connecticutensis (J.W.Robbins) Morong; J. Bot. 39: 199 (1901)

= Potamogeton ziziiformis Hagstr.; Bot. Not. 1908: 99 (1908)

species :

Potamogeton lacunatifolius Papch.; Veg. Watercourses Middle-Povolzhya 33 (2001)

Distribution: Siberia (W-Siberia)

30 SIB

Remarks: provisionally accepted name

species :

Potamogeton linguatus Hagstr. ex Dusén; Öfvers. Kongl. Vetensk.-Akad. Förh. 58: 259 (1901), et ex Macloskie in Rep. Princeton Univ. Exped. Patag. 8: 149 (1914)

Distribution: Argentina (Chubut, Neuquen, Rio Negro, Santa Cruz, Tierra del Fuego); Chile (Ñuble, Biobío, Araucanía, Los Rios, Los Lagos, Aisén, Magallanes); Falkland Isl.

85 ARG CLE 91 FAL

Synonyms: hidden

= Potamogeton badiovirens Hagstr.apud Skottsb.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 56(5): 170 (1916)

= Potamogeton badioviridis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 161 (1916)

species :

Potamogeton lucens L.; Sp. Pl. [Linnaeus] 1: 126 (1753)

Name: Spiegelndes Laichkraut (DE), Shining Pondweed (EN)

Distribution: England (England, Wales, Scotland, Orkney Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; Baleares; France; Channel Isl. (Guernsey); Sardinia; Italy; Sicily; Malta; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; Albania; Romania; Bulgaria; European Turkey; Greece (rare N- & C-Greece, N-Peloponnisos); Crete; Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Crimea; Morocco; Algeria; Tunisia; Libya; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur); Kazakhstan; Turkmenistan; Uzbekistan; Kyrgyzstan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (E-Anatolia, N-Anatolia, NE-Anatolia, S-Anatolia, SSW-Anatolia, SW-Anatolia, W-Anatolia); Iraq (NW-Iraq, SE-Iraq: Mesopotamia); Iran (E-Iran, W-Iran); Afghanistan (Ghazni); Lebanon (Antilebanon); Israel (coastal W-Israel, Rift Valley); Saudi Arabia (Asir); Bahrain; United Arab Emirates; Oman (Mascat & Oman); China (Anhui, Fujian, Gansu, Hebei, Heilongjiang, Jiangsu, Jilin, Jiangxi, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Henan, Yunnan, Xinjiang, Zhejiang); Mongolia; Japan (Honshu); Pakistan; Nepal; India (Himachal Pradesh, Jarnrnu and Kashmir, Punjab, Sikkim, Uttar Pradesh); Myanmar; Philippines (Luzon); Guam

10 DEN FIN GRB IRE NOR SWE 11 AUT BGM CZE GER HUN LUX NET POL SLO SWI 12 BAL CIS FRA POR SAR SPA 13 ALB BIH BUL CRO GRC ITA KOS KRI MLT MNT ROM SIC SLV SRB TUE 14 BLR EST KRY LAT LIT RUS UKR 20 ALG LBY MOR TUN 30 SIB 31 RFE 32 KAZ KGZ TKM TZK UZB 33 ARM AZE GEO NCS 34 AFG IRN IRQ ISR LEB TUR 35 BAR OMA SAU UAE 36 CHI 37 MON 38 JAP 40 IND NEP PAK 41 MYA 42 PHI 62 GUM

Remarks: records from tropical Africa refer to P. schweinfurthii

Synonyms: hidden

= Buccaferrea lucida (Gesner ex Salisb.) Bubani; Fl. Pyren. [Bubani] 4: 13 (1902), nom. illeg.

= Potamogeton acuminatus Schumach.; Enum. Pl. Saelland. 1: 49 (1801)

= Potamogeton americanus Roem. & Schult.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 509 (1818)

= Potamogeton angustifolius Bercht. & J.Presl ex Opiz; Böhm. Phan. Crypt. Gew. 23 (1823)

= Potamogeton caudatus Seidl ex Opiz; Böhm. Phan. Crypt. Gew. 23 (1823), nom. superfl.

= Potamogeton coriaceus (Mert. & W.D.J.Koch) Fryer; J. Bot. 27: 8 (1889)

= Potamogeton corniculatus Schur; Enum. Pl. Transsilv. 632 (1866)

= Potamogeton cornutus J.Presl & C.Presl; Fl. Cech. 37 (1819)

= Potamogeton gaudichaudii Cham. & Schltdl.; Linnaea 2: 197 (1827)

= Potamogeton lanceolatus Eichw.; Naturhist. Skizze Lithauen Volhynien Podolien [Eichwald] 126 (1830), nom. illeg.

= Potamogeton longifolius J.Gay ex Poir.; Encycl. [J.Lamarck et al.], Suppl. 4: 535 (1816)

= Potamogeton lucens f. acuminatus (Schumach.) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 23 (1845)

= Potamogeton lucens f. caudatus (Seidl) E.Baumann; Arch. Hydrobiol. Planktonk., Suppl. 1(Veg. Untersees): 93 (1911)

= Potamogeton lucens f. coriaceus (Mert. & W.D.J.Koch) Nolte ex Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 23 (1845)

= Potamogeton lucens f. excelsus Hagstr.; Sver. Fl. 797 (1901)

= Potamogeton lucens f. insignis Tiselius; Potamog. Suec. Exs. 2: no. 56 (1895)

= Potamogeton lucens f. lancifolius (Mert. & W.D.J.Koch) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 23 (1845)

= Potamogeton lucens f. longifolius (J.Gay ex Poir.) Cham. & Schltdl.; Linnaea 2: 198 (1827)

= Potamogeton lucens f. longifolius (J.Gay ex Poir.) E.Baumann; Arch. Hydrobiol. Planktonk., Suppl. 1(Veg. Untersees): 93 (1911), nom. inval.

= Potamogeton lucens f. ovalifolius (Mert. & W.D.J.Koch) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 23 (1845)

= Potamogeton lucens subsp. longifolius (Poir.) Magnin; Bull. Soc. Bot. France 43: 440 (1897)

= Potamogeton lucens subsp. macrophyllus (Wolfg.) Nyman; Consp. Fl. Eur. 682 (1882)

= Potamogeton lucens subsp. sinicus (Migo) H.Hara; J. Jap. Bot. 60(8): 238 (1985)

= Potamogeton lucens subsp. vaginans Bojer ex A.Benn.; Annuaire Conserv. Jard. Bot. Genève 9: 94 (1905)

= Potamogeton lucens subvar. acuminatus (Schumach.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 318 (1897)

= Potamogeton lucens subvar. insignis (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 78 (1907)

= Potamogeton lucens subvar. longifolius (J.Gay ex Poir.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 318 (1897)

= Potamogeton lucens var. acuminatus (Schumach.) Fr.; Novit. Fl. Svec. 46 (1817)

= Potamogeton lucens var. angustifolius Gray; Nat. Arr. Brit. Pl. 2: 34 (1821 publ. 1822)

= Potamogeton lucens var. corniculatus G.Mey.; Chloris Han. 522 (1836)

= Potamogeton lucens var. cornutus Döll; Fl. Baden [Döll] 1: 462 (1856)

= Potamogeton lucens var. cornutus Klett & Richt.; Fl. Leipzig 160 (1830)

= Potamogeton lucens var. cuspidatus Döll; Fl. Baden [Döll] 1: 461 (1856)

= Potamogeton lucens var. diversifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 849 (1823)

= Potamogeton lucens var. fluitans Coss. & Germ.; Fl. Descr. Anal. Paris 571 (1845)

= Potamogeton lucens var. fluviatilis Thore; Essai Chloris 43 (1803)

= Potamogeton lucens var. insignis (Tiselius) Druce; List Brit. Pl., ed. 2: 117 (1928)

= Potamogeton lucens var. lancifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 849 (1823)

= Potamogeton lucens var. longifolius (J.Gay ex Poir.) Crép.; Notes Pl. Rar. Belgique 3: 27 (1863), nom. illeg.

= Potamogeton lucens var. longifolius (J.Gay ex Poir.) Fresen.; Taschenb. Bot. Exkurs. [Fresenius], Abt. 1: 152 (1832)

= Potamogeton lucens var. longifolius DC.; Fl. Franç. [de Candolle & Lamarck], éd. 3, 6: 311 (1815)

= Potamogeton lucens var. nitens Cham.; Adnot. Fl. Berol. [Chamisso] 6 (1815)

= Potamogeton lucens var. nudus Gray; Nat. Arr. Brit. Pl. 2: 34 (1821 publ. 1822)

= Potamogeton lucens var. ovalifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 849 (1823), nom. illeg.

= Potamogeton lucens var. rotundifolius Klett & Richt.; Fl. Leipzig 160 (1830), nom. superfl.

= Potamogeton lucidus Salisb.; Prodr. Stirp. Chap. Allerton 68 (1796), nom. superfl.

= Potamogeton macrophyllus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 358 (1827)

= Potamogeton nitens Willd. ex Cham. & Schltdl.; Linnaea 2: 202 (1827), nom. illeg.

= Potamogeton proteus Cham. & Schlecht.; Linnaea 2: 196, t. 5, f. 16, a, b (1827)

= Potamogeton pseudolongifolius Papch.; Veg. Watercourses Middle-Povolzhya 63 (2001)

= Potamogeton rotundifolius C.F.Schultz; Prodr. Fl. Starg. Suppl. 1: 9 (1819), nom. illeg.

= Potamogeton sinicus Migo; J. Shanghai Sci. Inst. 3(3): 1 (1934)

= Potamogeton volhynicus Besser ex Roem. & Schult.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 509 (1818) (in obs.)

= Spirillus lucens (L.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton maackianus A.Benn.; J. Bot. [Hooker] 42: 74 (1904), nom. nov.

Distribution: Siberia (Buryatia, Chita, Irkutsk, Krasnoyarsk); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Magadan, Primorye, Sakhalin); China (N-China, E-China, C-China, SW-China); North Korea; South Korea; Japan (Hokkaido, Honshu, Kyushu); Sumatra; Philippines (Mindanao)

30 SIB 31 RFE 36 CHI 38 JAP KOR NKO 42 PHI SUM

Synonyms: hidden

= Potamogeton robbinsii var. japonicus A.Benn.; Bull. Herb. Boissier 4: 549 (1896)

= Potamogeton serrulatus Regel & Maack; Tent. Fl. Ussur. 139 (1861), non Opiz 1822

species :

Potamogeton mandschuriensis (A.Benn.) A.Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 50 (1924), also as ´manchuriensis´

Distribution: Russian Far East (Amur, Khabarovsk, Manchuria, Primorye, Sakhalin); China (Nei Mongol, NE-China)

31 RFE 36 CHI

Synonyms: hidden

= Potamogeton acutifolius subsp. mandschuriensis A.Benn.; J. Bot. 42: 76 (1904) (also as ´manchuriensis´)

species :

Potamogeton marianensis Cham. & Schltdl.; Linnaea 2: 228 (1827)

Distribution: Guam

62 GUM

Synonyms: hidden

= Potamogeton fluitans var. marianensis Cham. & Schltdl. ex Bryan

= Potamogeton natans proles marianensis (Cham. & Schltdl.) Nolte ex Graebn.

= Potamogeton natans var. marianensis (Cham. & Schltdl.) Nolte

species :

Potamogeton montevidensis A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 293 (1892)

Distribution: Colombia (Boyacá, Cundinamarca); SE-Brazil (Rio de Janeiro); S-Brazil (Santa Catarina); Paraguay (sin localidad); Uruguay (San Jose); Argentina (Corrientes); Chile (Biobío)

82 CLM 84 BRA 85 ARG CLE PAR URU

Synonyms: hidden

= Potamogeton stenostachys K.Schum.; Fl. Bras. [Martius] 3(3): 687 (1894)

species :

Potamogeton montezumawellensis Ricketson, G.M.Ricketson & Greenawalt; J. Bot. Res. Inst. Texas 12(2): 451 (2018)

Distribution: USA (Arizona)

76 USA

species :

Potamogeton natans L.; Sp. Pl. [Linnaeus] 1: 126 (1753)

Name: Schwimmendes Laichkraut (DE), Broad-leaved Pondweed (EN)

Distribution: Iceland; Faeroe Isl.; England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl., +Isles of Scilly); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Liechtenstein; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; Andorra; France; Channel Isl. (Alderney, Guernsey, Jersey); Corsica; Sardinia; Italy; Sicily; Malta; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; North Macedonia; Albania; Romania; Bulgaria; European Turkey; Greece (rare mainland); Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Crimea; Morocco; Algeria; Tunisia; Libya; Chad; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Kuril Isl., Magadan, Primorye, Sakhalin); Kazakhstan; Uzbekistan; Kyrgyzstan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; +East Aegaean Isl. (+Samos); Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, SSW-Anatolia, W-Anatolia); Afghanistan (Bamyan, Ghazni); Syria (C-Syrian Desert); Yemen (Inner Hadhramaut); Yemen (N-Inner Yemen); China (Heilongjiang, Jilin, Liaoning, Xinjiang); Tibet; Mongolia; North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Pakistan (Kurram, Pakistani Punjab); Nepal; India (Himachal Pradesh, Ladakh, Punjab, Sikkim, Uttar Pradesh); Myanmar (Shan); Alaska; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Ontario, Prince Edward Isl., Québec, Saskatchewan); USA (Arizona, California, Colorado, Connecticut, Delaware, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Baja California Norte, Ciudad de Mexico, Mexico State, Michoacán)

10 DEN FIN FOR GRB ICE IRE NOR SWE 11 AUT BGM CZE GER HUN LIE LUX NET POL SLO SWI 12 ADO CIS COR FRA POR SAR SPA 13 ALB BIH BUL CRO GRC ITA KOS MLT MNT NMA ROM SIC SLV SRB TUE 14 BLR EST KRY LAT LIT RUS 20 ALG LBY MOR TUN 24 CHA 30 SIB 31 RFE 32 KAZ KGZ TZK UZB 33 ARM AZE GEO NCS 34 AFG EAI SYR TUR 35 YEM 36 CHI TIB 37 MON 38 JAP KOR NKO 40 IND NEP PAK 41 MYA 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX

Synonyms: hidden

= Buccaferrea natans (L.) Bubani; Fl. Pyren. [Bubani] 4: 11 (1901)

= Potamogeton affinis Boenn. ex Cham. & Schltdl.; Linnaea 2: 216 (1827)

= Potamogeton besseri Steud.; Nomencl. Bot. [Steudel], ed. 2, 2: 384 (1841)

= Potamogeton kirkii Syme; Engl. Bot., ed. 3B, 9: 31 (1869)

= Potamogeton morongii A.Benn.; J. Bot. 44: 145 (1904)

= Potamogeton natans f. angustifolius Regel; Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 7, 4(4): 139 (1861)

= Potamogeton natans f. fluviatilis (Fr.) Hagstr.; Sver. Fl. 795 (1901)

= Potamogeton natans f. lancifolius (Fieber) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 26 (1845)

= Potamogeton natans f. ovalifolius (Fieber) M.Goldschm.; Verh. Phys.-Med. Ges. Würzburg, N. F. 34: 352 (1902)

= Potamogeton natans f. ovalifolius (Fieber) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 26 (1845)

= Potamogeton natans f. prolixus (W.D.J.Koch) Sagorski & Gus.Schneider; Fl. Centralkarpath. [Sagorski & Gus.Schneider] 566 (1891)

= Potamogeton natans f. rotundifolius (Bréb.) Hagstr.; Sver. Fl. 795 (1901)

= Potamogeton natans subsp. ellipticus Gaudin; Fl. Helv. 1: 467 (1828)

= Potamogeton natans subsp. kirkii (Syme) Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton natans subsp. petiolaris (Nyman) Arcang.; Comp. Fl. Ital. [Arcangeli] 642 (1882)

= Potamogeton natans subsp. petiolatus (Wolfg.) K.Richt.; Pl. Eur. [K.Richter] 1: 11 (1890)

= Potamogeton natans subsp. vulgaris Gaudin; Fl. Helv. 1: 465 (1828)

= Potamogeton natans subsp. vulgaris Schübl. & G.Martens; Fl. Würtemberg 109 (1834)

= Potamogeton natans var. acaulis Wahlb.; Fl. Gothob. 23 (1820)

= Potamogeton natans var. angustifolius G.Mey.; Chloris Han. 519 (1836)

= Potamogeton natans var. angustifolius Wender.; Fl. Hassiaca [Wenderoth] 40 (1846)

= Potamogeton natans var. fluviatilis Fr.; Novit. Fl. Suec. Alt. 28 (1828)

= Potamogeton natans var. intermedius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 839 (1823), nom. superfl.

= Potamogeton natans var. lancifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 260 (1838)

= Potamogeton natans var. major W.D.J.Koch & Ziz; Cat. Pl. Palat. 18 (1814)

= Potamogeton natans var. media W.D.J.Koch & Ziz; Cat. Pl. Palat. 18 (1814)

= Potamogeton natans var. minor Hook.f.; Bot. Antarct. Voy. III (Fl. Tasman.) 2: 4 (1859), nom. illeg.

= Potamogeton natans var. minor Roth; Tent. Fl. Germ. 72 (1788), nom. inval., et 202 (1789)

= Potamogeton natans var. minor Wender.; Fl. Hassiaca [Wenderoth] 41 (1846), nom. illeg.

= Potamogeton natans var. ovalifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 260 (1838)

= Potamogeton natans var. petiolaris Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton natans var. petiolatus (Wolfg. ex Schult.) Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton natans var. prolixus W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 2: 775 (1844)

= Potamogeton natans var. pygmaeus Gaudin; Fl. Helv. 1: 466 (1828)

= Potamogeton natans var. rotundifolius Bréb.; Fl. Normandie, éd. 3: 285 (1859)

= Potamogeton natans var. serotinus Wigand; Fl. Kurhessen [Wigand] 298 (1859)

= Potamogeton natans var. subnatans Wahlenb.; Fl. Lapp. [Wahlenberg] 52 (1812)

= Potamogeton natans var. terrestris Döll; Rhein. Fl. [Döll] 238 (1843)

= Potamogeton natans var. terrestris Gray; Nat. Arr. Brit. Pl. 2: 33 (1821 publ. 1822)

= Potamogeton natans var. vulgaris Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 837 (1823)

= Potamogeton paludosus Bory ex Cham. & Schltdl.; Linnaea 2: 216 (1827)

= Potamogeton petiolaris C.Presl; Delic. Prag. 151 (1822), nom. illeg.

= Potamogeton petiolatus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 352 (1827)

= Potamogeton plantago T.Bastard; Essai Fl. Maine-et-Loire 64 (1809)

= Potamogeton samariformis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 166 (1916)

= Potamogeton serotinus Schrad. ex W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 2: 775 (1844), nom. inval.

= Potamogeton sparganiifolius Bab.; Man. Brit. Bot. [Babington], ed. 6: 363 (1867)

= Potamogeton uliginosus Boenn. ex Cham. & Schltdl.; Linnaea 2: 216 (1827)

= Potamogeton ×fluitans subsp. petiolaris (Nyman) Cif. & Giacom.; Nomenclator Fl. Ital. 1: 14 (1950)

= Potamogeton ×fluitans var. petiolatus (Wolfg.) Nyman; Consp. Fl. Eur. Suppl. 2: 286 (1890)

= Spirillus natans (L.) Nieuwl.; Amer. Midl. Naturalist 3: 16 (1913)

species :

Potamogeton nodosus Poir.; Encycl. [J.Lamarck et al.], Suppl. 4(2): 535 (1816)

Name: Flutendes Laichkraut, Knoten-Laichkraut (DE); Longleaf Pondweed, Loddon Pondweed (EN); Hierba de agua foliosa (ES)

Distribution: England (S-England); Netherlands; Luxembourg; Germany (Brandenburg, +Berlin, Baden-Württemberg, Bayern, Hessen, +Hamburg, +Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; France; Italy; Sicily; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; North Macedonia; Albania; Romania; Bulgaria; European Turkey; Greece (scattered to rare mainland, Andros, Tinos, Naxos, Samothraki, Limnos); Crete; Lithuania; Belarus; European Russia (C-European Russia, W-European Russia, E-European Russia); Ukraine; Crimea; Morocco; Algeria; Tunisia; Libya; Egypt (Eastern Desert, NE-Egypt, Nile Delta, Nile Valley, NW-coastal Egypt, SE-Egypt); Azores (Santa Maria Isl., Pico, Sao Miguel Isl.); Canary Isl. (Gran Canaria, Tenerife, La Gomera); Mauritania; Senegal; Niger; Bioko Isl. [Fernando Poo]; ?D.R.Congo [Zaire]; Rwanda; Burundi; Chad; Sudan; South Sudan; Ethiopia; Somalia; +Soqotra; Uganda; Tanzania; Angola; Zambia; Zimbabwe; Madagascar; Comores (Mayotte, etc.); Mauritius; La Réunion; Seychelles; Siberia (Chita); Russian Far East (Amur, Khabarovsk, Primorye); Kazakhstan; Turkmenistan; Uzbekistan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; East Aegaean Isl. (Ikaria, Rhodos); Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, NW-Anatolia: Bithynia, S-Anatolia, SE-Anatolia, SSW-Anatolia, SW-Anatolia, W-Anatolia); Iraq (NE-Iraq, NW-Iraq, SE-Iraq: Mesopotamia); Iran (N-Iran, S-Iran, W-Iran); Afghanistan (Baghlan, Bamyan, Helmand, Kandahar, Nimroz, Orozgan / Daykundi, Paktia / Khost, Qunduz, Takhar); Cyprus (C-Mountains, W-Cyprus); Lebanon (C-Lebanon, coastal W-Lebanon); Syria (coastal W-Syria, C-Syrian Desert, Jazira, NW-Syria); Israel (coastal W-Israel, Rift Valley, N-Israel); Saudi Arabia (NE-Saudi Arabia, Asir); United Arab Emirates; Oman (Dhofar, Mascat & Oman); Yemen (W-Yemen); China (widespread); North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Ryukyu Isl.; Taiwan; Pakistan; Nepal; India (almost throughout); Sri Lanka; Bangladesh; Andaman Isl.; Myanmar; Thailand; Laos; Cambodia; Vietnam; Sumatra; Sulawesi; Philippines (Luzon); Java; Lesser Sunda Isl.; Lesser Sunda Isl.; New Guinea (Papua New Guinea); New Caledonia; Hawaii (Oahu, Maui); Canada (Alberta, British Columbia, New Brunswick, Nova Scotia, Ontario, Québec, Saskatchewan); USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Aguascalientes, Baja California Norte, Campeche, Chiapas, Chihuahua, Coahuila, Colima, Ciudad de Mexico, Durango, Guanajuato, Hidalgo, Jalisco, Mexico State, Michoacán, Nayarit, Nuevo León, Oaxaca, Puebla, Queretaro, Quintana Roo, San Luis Potosi, Sinaloa, Sonora, Tabasco, Tamaulipas, Tlaxcala, Veracruz, Zacatecas); Revillagigedos Isl. (Isla Socorro); Guatemala; Panama; Bahamas; Cuba; Jamaica; Hispaniola; Puerto Rico; Dominica; Martinique; Trinidad; Venezuela (Carabobo, Cojedes, Venezuela Distrito Federal, Falcon, Miranda, Zulia); Peru; N-Brazil (Pará)

10 GRB 11 AUT CZE GER HUN LUX NET POL SLO SWI 12 FRA POR SPA 13 ALB BIH BUL CRO GRC ITA KRI MNT NMA ROM SIC SLV TUE 14 BLR KRY LIT RUS UKR 20 ALG EGY LBY MOR TUN 21 AZO CNY 22 MTN NGR SEN 23 BIO BUR RWA 24 CHA ETH SOC SOM SSU SUD 25 TAN UGA 26 ANG ZAM ZIM 29 COM MAU MDG REU SEY 30 SIB 31 RFE 32 KAZ TKM TZK UZB 33 ARM AZE GEO NCS 34 AFG CYP EAI IRN IRQ ISR LEB SYR TUR 35 OMA SAU UAE YEM 36 CHI 38 JAP KOR NKO NNS TAI 40 BAN IND NEP PAK SRL 41 AND CBD LAO MYA THA VIE 42 JAW LSI NWG PHI SUL SUM 60 NWC 63 HAW 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX RGI 80 GUA PAN 81 BAH CUB DOM HIS JAM MAR PUE TRT 82 VEN 83 PER 84 BRA

Synonyms: hidden

= Potamogeton americanus Cham. & Schltdl.; Linnaea 2: 226 (1827), nom. illeg.

= Potamogeton americanus subsp. mascarensis (Cham. & Schltdl.) A.Benn.; J. Bot. 46: 160 (1908)

= Potamogeton americanus var. novaeboracensis (Morong) A.Benn.; J. Bot. 31: 297 (1893)

= Potamogeton americanus var. thunbergii (Cham. & Schltdl.) A.Benn.; Fl. Cap. [Harvey & auct. succ.] 6: 46 (1897)

= Potamogeton canariensis Link; Phys. Beschr. Canar. Ins. [Buch] 138 (1828)

= Potamogeton drucei Fryer; Potamoget. Brit. 31 (1898)

= Potamogeton indicus Roxb.; Hort. Bengal. 12 (1814), nomen, Fl. Ind. [Carey & Wallich ed.] 1: 471 (1820), Fl. Ind, ed. Carey. 1: 452 (1832)

= Potamogeton insulanus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 154 (1916)

= Potamogeton leschenaultii Cham. & Schltdl.; Linnaea 2: 222, t. 6, f. 23 (1827)

= Potamogeton lonchites var. novaeboracensis Morong; Mem. Torrey Bot. Club 3(2): 20 (1893)

= Potamogeton machianus Lowe ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 58 (1907)

= Potamogeton malaianus Miq.; Ill. Fl. Archip. Ind. 46 (1870)

= Potamogeton mascarensis Cham. & Schltdl.; Linnaea 2: 228 (1827)

= Potamogeton mexicanus A.Benn.; J. Bot. 25: 289 (1887)

= Potamogeton montanus C.Presl; Reliq. Haenk. 2: 85 (1832)

= Potamogeton natans f. capensis Kunth; Enum. Pl. [Kunth] 3: 128 (1841)

= Potamogeton natans subsp. explanatus (Mert. & W.D.J.Koch) K.Richt.; Pl. Eur. [K.Richter] 1: 11 (1890)

= Potamogeton natans var. canariensis (Link) T.Durand & Schinz; Consp. Fl. Afr. [Durand & Schinz] 494 (1894)

= Potamogeton natans var. capensis T.Durand & Schinz; Consp. Fl. Afr. [Durand & Schinz] 494 (1894), nom. illeg.

= Potamogeton natans var. explanatus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3: 837 (1823), nom. illeg.

= Potamogeton natans var. fluitans Roth ex Cham.; Adnot. Fl. Berol. [Chamisso] 4 (1815)

= Potamogeton natans var. fluviatilis Schltdl.; Fl. Berol. [Schlechtendal] 1: 115 (1823)

= Potamogeton natans var. mexicanus M.Martens & Galeotti; Bull. Acad. Roy. Sci. Bruxelles 10(1): 121 (1843)

= Potamogeton natans var. serotinus (Schrad. ex Schult. & Schult.f.) Boiss.; Fl. Orient. [Boissier] 5: 16 (1882)

= Potamogeton nodosus f. angustissimus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 188 (1916)

= Potamogeton nodosus f. brevifolius (Fisch.) Soó; Acta Bot. Acad. Sci. Hung. 16(3-4): 365 (1970 publ. 1971)

= Potamogeton nodosus f. congestus (Fisch.) Soó; Acta Bot. Acad. Sci. Hung. 16(3-4): 365 (1970 publ. 1971)

= Potamogeton nodosus f. latifolius (G.Fisch.) Soó; Acta Bot. Acad. Sci. Hung. 16: 365 (1970 publ. 1971)

= Potamogeton nodosus f. spathulifolius (Fisch.) Soó; Acta Bot. Acad. Sci. Hung. 16(3-4): 365 (1970 publ. 1971)

= Potamogeton nodosus var. stagnatilis (Koch) Soó; Acta Bot. Acad. Sci. Hung. 16(3-4): 365 (1970 publ. 1971)

= Potamogeton nuttallii var. portoricensis (Graebn.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 56 (1907)

= Potamogeton oblongifolius J.R.Forst.; Fl. Amer. Sept. [Forster] 7 (1771), nom. rej.

= Potamogeton occidentalis Sieber ex Cham. & Schltdl.; Linnaea 2: 224 (1827)

= Potamogeton owaihiensis Cham. & Schltdl.; Linnaea 2: 228 (1827)

= Potamogeton pensylvanicus var. portoricensis Graebn.; Symb. Antill. [Urban] 4: 73 (1903)

= Potamogeton peruviana C.Presl; J. Bot. 28: 298 (1890)

= Potamogeton petiolaris Raf.; Med. Repos., Ser. 3, 2: 409 (1811), nom. utique rej.

= Potamogeton rotundatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 153 (1916)

= Potamogeton roxburghianus Schult. & Schult.f.; Mant. 3 [Schultes]: 367 (1827)

= Potamogeton roxburghii F.Dietr.; Neu. Nachtr. Vollst. Lex. Gärtn. 7: 231 (1837), nom. superfl.

= Potamogeton semicoloratus A.Benn.; J. Bot. 48: 150 (1910)

= Potamogeton serotinus Schrad.; Mant. 3 [Schultes & Schultes f.]: 351 (1827)

= Potamogeton stagnorum Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 159 (1916)

= Potamogeton syriacus Cham. & Schltdl.; Linnaea 2: 227 (1827)

= Potamogeton ×fluitans proles mascarensis (Cham. & Schltdl.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 60 (1907)

= Potamogeton ×fluitans proles novaeboracensis (Morong) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 62 (1907)

= Potamogeton ×fluitans proles syriacus (Cham. & Schltdl.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 60 (1907)

= Potamogeton ×fluitans proles thunbergii (Cham. & Schltdl.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 61 (1907)

= Potamogeton ×fluitans f. brevifolius G.Fisch.; Ber. Bayer. Bot. Ges. 11: 54 (1907)

= Potamogeton ×fluitans f. congestus G.Fisch.; Ber. Bayer. Bot. Ges. 11: 54 (1907)

= Potamogeton ×fluitans f. latifolius G.Fisch.; Ber. Bayer. Bot. Ges. 11: 54 (1907)

= Potamogeton ×fluitans f. spathulifolius G.Fisch.; Ber. Bayer. Bot. Ges. 11: 54 (1907)

= Potamogeton ×fluitans subsp. americanus Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 62 (1907)

= Potamogeton ×fluitans var. americanus (Graebn.) P.Fourn.; Quatre Fl. France 140 (1935)

= Potamogeton ×fluitans var. canariensis (Link) Webb & Berthel.; Hist. Nat. Îles Canaries (Phytogr.) 2(3): 299 (1847)

= Potamogeton ×fluitans var. novaeboracensis (Morong) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 62 (1907)

= Potamogeton ×fluitans var. robustus Tab.Morais; Bol. Soc. Brot., Ser. 2, 11: 155 (1936)

= Potamogeton ×fluitans var. stagnatilis W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 2: 776 (1844)

species :

Potamogeton oakesianus Robbins ex A.Gray; Manual [A.Gray] ed. 5: 485 (1867)

Name: Oakes´ pondweed

Distribution: Canada (British Columbia, Labrador, New Brunswick, Newfoundland, Nova Scotia, Ontario, Québec); St. Pierre et Miquelon; USA (Connecticut, Indiana, Massachusetts, Maine, Michigan, Minnesota, Montana, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Tennessee, Virginia, Vermont, Wisconsin, West Virginia)

71 CDN 72 CDN SPM 73 USA 74 USA 75 USA 78 USA

Synonyms: hidden

= Potamogeton purshii Tuck. ex Asch. & Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 45 (1907), nom. superfl.

species :

Potamogeton obtusifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 855 (1823)

Name: Stumpfblättriges Laichkraut (DE), Blunt-leaved Pondweed (EN)

Distribution: England (England, Wales, Isle of Man, Scotland, Outer Hebrides); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; France; Italy; Slovenia; Croatia; Serbia; Kosovo; Romania; Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Magadan); Kazakhstan; Kyrgyzstan; China (Gansu, Heilongjiang, Jilin, Liaoning, Nei Mongol, Shaanxi, Xinjiang); Mongolia; ?Japan; Myanmar; Alaska; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Québec, Saskatchewan, Yukon); USA (Connecticut, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Washington State, Wisconsin, Wyoming)

10 DEN FIN GRB IRE NOR SWE 11 AUT BGM CZE GER HUN LUX NET POL SLO SWI 12 FRA 13 CRO ITA KOS ROM SLV SRB 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ KGZ 36 CHI 37 MON 41 MYA 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 78 USA

Synonyms: hidden

= Buccaferrea obtusifolia (Mert. & W.D.J.Koch) Bubani; Nuovo Giorn. Bot. Ital. 5: 317 (1873)

= Potamogeton divaricatus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 355 (1827)

= Potamogeton liljebladii Wallman ex Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 16 (1845)

= Potamogeton obtusifolius f. acutus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton obtusifolius f. angustifolius (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius f. apiculatus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton obtusifolius f. contractus Cham. & Schltdl.; Linnaea 2: 179 (1827)

= Potamogeton obtusifolius f. elongatus Cham. & Schltdl.; Linnaea 2: 179 (1827)

= Potamogeton obtusifolius f. insolitus Tiselius; Potamog. Suec. Exs. 3: 150 (1897)

= Potamogeton obtusifolius f. latifolius (Fieber) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 16 (1845)

= Potamogeton obtusifolius f. latifolius (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius f. microcarpus Hyl.; Bot. Not. 1953: 352 (1953)

= Potamogeton obtusifolius f. muticus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton obtusifolius f. obtusus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton obtusifolius subf. acutus (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius subf. apiculatus (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius subf. muticus (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius subf. obtusus (Fieber) Soó; Magyar Biol. Kutatóint. Munkái 8: 228 (1936)

= Potamogeton obtusifolius subvar. acutus (Fieber) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 109 (1907)

= Potamogeton obtusifolius subvar. apiculatus (Fieber) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 109 (1907)

= Potamogeton obtusifolius subvar. muticus (Fieber) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 108 (1907)

= Potamogeton obtusifolius subvar. obtusus (Fieber) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 109 (1907)

= Potamogeton obtusifolius var. angustifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton obtusifolius var. elongatus G.Fisch.; Ber. Bayer. Bot. Ges. 11: 102 (1907), nom. illeg.

= Potamogeton obtusifolius var. latifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 275 (1838)

= Potamogeton tataricus Less.; Linnaea 9: 206 (1834)

= Spirillus obtusifolius (Mert. & W.D.J.Koch) Nieuwl.; Amer. Midl. Naturalist 3: 19 (1913)

species :

Potamogeton ochreatus Raoul; Ann. Sci. Nat., Bot., Sér. 3, 2: 117 (1844)

Distribution: New Guinea (Papua New Guinea); Australia (Western Australia, South Australia, Queensland, New South Wales, Victoria, Tasmania); New Zealand; Auckland Isl.; New Caledonia

42 NWG 50 AUS 51 AUC NZL 60 NWC

Synonyms: hidden

= Potamogeton angustifolius Caley ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 101 (1907)

= Potamogeton furcatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 80 (1916)

= Potamogeton gramineus R.Br.; Prodr. Fl. Nov. Holland. 343 (1810), nom. illeg.

= Potamogeton ochreatus f. latifolius A.Benn.; J. Bot. 45: 375 (1907)

= Potamogeton ochreatus var. latifolius Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 101 (1907)

species :

Potamogeton octandrus Poir.; Encycl. [J.Lamarck et al.], Suppl. 4: 534 (1816) s. str.

Distribution: Russian Far East (Amur, Khabarovsk, Primorye); China (Guangxi, Heilongjiang, Hubei, Jilin, Jiangsu, Liaoning, Shaanxi); North Korea; South Korea; Japan (Honshu, Shikoku, Kyushu); Ryukyu Isl. (Iriomote); Pakistan; Nepal; India (Meghalaya, Sikkim); Bangladesh; Vietnam; Java; New Guinea (Papua New Guinea)

31 RFE 36 CHI 38 JAP KOR NKO NNS 40 BAN IND NEP PAK 41 VIE 42 JAW NWG

Remarks: octandrus agg.

Synonyms: hidden

= Hydrogeton heterophyllus Lour.; Fl. Cochinch. 1: 244 (1790), non Potamogeton heterophyllus Schreb. (1771)

= Potamogeton asiaticus A.Benn.; Annuaire Conserv. Jard. Bot. Genève 6: 103 (1905)

= Potamogeton hubeiensis W.X.Wang; Acta Phytotax. Sin. 26(2): 160-161, f. 1 (1988)

= Potamogeton iriomotensis Masam.; Trans. Nat. Hist. Soc. Formosa 24: 281 (1934)

= Potamogeton limosellifolius Maxim. ex Korsh.; Trudy Imp. S.-Peterburgsk. Bot. Sada 12: 393 (1892)

= Potamogeton mizuhikimo Makino; Ill. Fl. Japan 1: 9 (1891)

= Potamogeton numasakianus A.Benn.; Annuaire Conserv. Jard. Bot. Genève 9: 104 (1905)

= Potamogeton octandrus subsp. limosellifolius (Maxim. ex Korsh.) Vorosch.; Florist. Issl. Razn. Raionakh S.S.S.R. [A.K.Skvortsov] 147 (1985)

= Potamogeton octandrus var. asiaticus (A.Benn.) Tzvelev; Sosud. Rast. Sovet. Dal´nego Vostoka 2: 323 (1987)

= Potamogeton octandrus var. limosellifolius (Maxim. ex Korsh.) Tzvelev; Sosud. Rast. Sovet. Dal´nego Vostoka 2: 323 (1987)

= Potamogeton octandrus var. mizuhikimo (Makino) H.Hara; J. Jap. Bot. 20: 331 (1944)

= Potamogeton subfuscus A.Benn.; J. Bot. 65: 114 (1927)

species :

Potamogeton oxyphyllus Miq.; Ann. Mus. Bot. Lugduno-Batavi 3: 161 (1867)

Distribution: Russian Far East (Primorye); China (Hubei, Heilongjiang, Jilin, Liaoning, Shaanxi, Yunnan, Fujian, Zhejiang, Jiangsu, Anhui, Jiangxi); North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Taiwan; N-Sumatra

31 RFE 36 CHI 38 JAP KOR NKO TAI 42 SUM

Synonyms: hidden

= Potamogeton chongyangensis W.X.Wang; Acta Phytotax. Sin. 22(6): 490-492, f. 1 (1984)

species :

Potamogeton papuanicus Wiegleb; Blumea 37(2): 379 (1993)

Distribution: Lesser Sunda Isl. (Timor); New Guinea (Irian Jaya, Papua New Guinea)

42 LSI NWG

species :

Potamogeton paramoanus R.R.Haynes & Holm-Niels.; Syst. Bot. 7(4): 498 (1982)

Distribution: Costa Rica; Colombia (Antioquia, Boyacá, Cauca, Cundinamarca, Nariño, Putumayo, Santander); Ecuador; Peru; Bolivia

80 COS 82 CLM 83 BOL ECU PER

species :

Potamogeton parmatus Hagstr.; Bot. Not. 97 (1908)

Distribution: Madagascar

29 MDG

species :

Potamogeton parvifolius Buchenau; Abh. Naturwiss. Verein Bremen 7: 32 (1880)

Distribution: Senegal; Guinea; Sierra Leone; Liberia; Mali; Burkina Faso; Ivory Coast; ?Benin; Nigeria; Cameroon; Equatorial Guinea; Congo [Brazzaville]; ?Central African Republic; D.R.Congo [Zaire]; Rwanda; Burundi; SW-Chad; South Sudan; Uganda; Kenya; Tanzania; Angola; Zambia; Malawi; Zimbabwe; Mozambique; Namibia; Botswana; South Africa (Limpopo, Gauteng, Mpulamanga, KwaZulu-Natal); Madagascar

22 BKN GUI IVO LBR MLI NGA SEN SIE 23 BUR CMN CON EQG RWA ZAI 24 CHA SSU 25 KEN TAN UGA 26 ANG MLW MOZ ZAM ZIM 27 BOT NAM SAF 29 MDG

Remarks: octandrus agg.

Synonyms: hidden

= Potamogeton huillensis Welw. ex A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 292 (1892)

= Potamogeton octandrus subsp. ethiopicus Lye; Lidia 3(3): 79 (1993)

= Potamogeton preussii A.Benn.; Fl. Trop. Afr. [Oliver et al.] 8: 222 (1901)

species :

Potamogeton perfoliatus L.; Sp. Pl. [Linnaeus] 1: 126 (1753)

Name: Durchwachsenes Laichkraut (DE), Perfoliate Pondweed, Claspingleaf Pondweed (EN)

Distribution: Iceland; Faeroe Isl.; England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl., +Isles of Scilly); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; France; Italy; Malta; Slovenia; Croatia; Bosnia & Hercegovina; Montenegro; Serbia; Kosovo; North Macedonia; Albania; Romania; Bulgaria; European Turkey; Greece (scattered N- & C-Greece, N-Peloponnisos); Estonia; Latvia; Lithuania; Belarus; European Russia (W-European Russia, C-European Russia, E-European Russia, N-European Russia); Ukraine; Crimea; ?Morocco; Algeria; Libya; Egypt (NE-Egypt, Nile Valley); Mauritania; Niger; N-Chad; Sudan; Ethiopia; Madagascar; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Amur, Kamchatka, Khabarovsk, Kuril Isl., Magadan, Primorye, Sakhalin); Kazakhstan; Turkmenistan; Uzbekistan; Kyrgyzstan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, NW-Anatolia: Bithynia, SSW-Anatolia, W-Anatolia); Iraq (NW-Iraq, SE-Iraq: Mesopotamia, S-Iraq); Iran (E-Iran, N-Iran, W-Iran); Afghanistan (Badghys, Baghlan, Bamyan, Herat, Kabul, Wardak, Qunduz, Takhar, Zabul); Syria (NW-Syria); Israel (coastal W-Israel, Rift Valley, N-Israel); China (Gansu, Guizhou, Hebei, Hunan, Heilongjiang, Hubei, Hunan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Xinjiang, Yunnan); Mongolia; North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Pakistan (Pakistani Punjab, Baluchistan, Sind, Swat, Baltistan); Nepal; India (Andhra Pradesh, Bihar, Gujarat, Himachal Pradesh, Jammu and Kashmir, Karnataka, Madhya Pradesh Maharashtra, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Uttar Pradesh, West Bengal); Sri Lanka; Sumatra; Australia (South Australia, SE-Queensland, New South Wales, Victoria); Alaska; Greenland; Canada (British Columbia, Labrador, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isl., Québec); St. Pierre et Miquelon; USA (Alabama, Connecticut, District of Columbia, Delaware, Florida, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Texas, Virginia, Vermont, Wisconsin); Guatemala [I]; Cuba

10 DEN FIN FOR GRB ICE IRE NOR SWE 11 AUT BGM CZE GER HUN LUX NET POL SLO SWI 12 FRA POR SPA 13 ALB BIH BUL CRO GRC ITA KOS MLT MNT NMA ROM SLV SRB TUE 14 BLR EST KRY LAT LIT RUS UKR 20 ALG EGY LBY 22 MTN NGR 24 CHA ETH SUD 29 MDG 30 SIB 31 RFE 32 KAZ KGZ TKM TZK UZB 33 ARM AZE GEO NCS 34 AFG IRN IRQ ISR SYR TUR 36 CHI 37 MON 38 JAP KOR NKO 40 IND NEP PAK SRL 42 SUM 50 AUS 70 ASK GNL 71 CDN 72 CDN SPM 74 USA 75 USA 77 USA 78 USA 80 gua 81 CUB

Synonyms: hidden

= Buccaferrea amplexicaulis (Kar.) Bubani; Fl. Pyren. [Bubani] 4: 13 (1901)

= Peltopsis perfoliata (L.) Raf.; J. Phys. Chim. Hist. Nat. Arts 89: 103 (1819)

= Potamogeton alatofructus A.Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 49 (1924)

= Potamogeton amplexicaulis Kar.; Bull. Soc. Imp. Naturalistes Moscou 12: 173 (1839)

= Potamogeton bupleuroides Fernald; Manual [A.Gray] ed. 7: 15 (1908)

= Potamogeton fulvus Riddell; New Orleans Med. Surg. J. 9: 615 (1853)

= Potamogeton juzepczukii P.I.Dorof. & Tzvelev; Novosti Sist. Vyssh. Rast. 20: 4 (1983)

= Potamogeton loeselii Honck.; Verz. Gew. Teutschl. 487 (1782)

= Potamogeton perfoliatus f. acutifolius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 256 (1916)

= Potamogeton perfoliatus f. densifolius Tiselius; Potamog. Suec. Exs. 2: no. 91 (1895)

= Potamogeton perfoliatus f. exornatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 256 (1916)

= Potamogeton perfoliatus f. imbecillus Tiselius; Potamog. Suec. Exs. 2: no. 92 (1895)

= Potamogeton perfoliatus f. lanceolatus (Blytt) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 256 (1916)

= Potamogeton perfoliatus f. longifolius Tiselius; Potamog. Suec. Exs. 3: no. 146 (1897)

= Potamogeton perfoliatus f. ovatolanceolatus Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 19 (1845)

= Potamogeton perfoliatus f. ovatus Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 19 (1845)

= Potamogeton perfoliatus f. prolixus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 254 (1916)

= Potamogeton perfoliatus f. rotundifolius (Wallr.) Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 19 (1845)

= Potamogeton perfoliatus f. simplex Tiselius; Potamog. Suec. Exs. 3: no. 145 (1897)

= Potamogeton perfoliatus f. simplex Tiselius ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 254 (1916)

= Potamogeton perfoliatus subsp. bupleuroides (Fernald) R.T.Clausen; Cornell Univ. Agric. Exp. Sta. Mem. 291: 10 (1949)

= Potamogeton perfoliatus subsp. loeselii (Roem. & Schult.) Schübl. & G.Martens; Fl. Würtemberg 110 (1834)

= Potamogeton perfoliatus var. bupleuroides (Fernald) Farw.; Amer. Midl. Naturalist 8: 264 (1923)

= Potamogeton perfoliatus var. densifolius G.Mey.; Chloris Han. 523 (1836)

= Potamogeton perfoliatus var. gracilis Fr.; Novit. Fl. Suec. Alt. 42 (1828)

= Potamogeton perfoliatus var. gracilis Jess.; Deut. Excurs.-Fl. 597 (1879), nom. illeg.

= Potamogeton perfoliatus var. lacustris Wallman; Utkast Sv. Fl., ed. 3: 706 (1816)

= Potamogeton perfoliatus var. lanceolatus Blytt; Norges Fl. 1: 367 (1861)

= Potamogeton perfoliatus var. lancifolius Wimm. & Grab.; Fl. Siles. [Wimmer & Grabowski] 1: 141 (1827)

= Potamogeton perfoliatus var. loeselii (Honck.) Gaudin; Fl. Helv. 1: 475 (1828), nom. superfl.

= Potamogeton perfoliatus var. macrophyllus Blytt; Norges Fl. 1: 367 (1861)

= Potamogeton perfoliatus var. mandshuriensis A.Benn.; Annuaire Conserv. Jard. Bot. Genève 9: 100 (1905)

= Potamogeton perfoliatus var. minor F.M.Bailey; Compr. Cat. Queensland Pl., ed. 2: 583 (1913)

= Potamogeton perfoliatus var. muelleri A.Benn.; J. Bot. 25: 178 (1887)

= Potamogeton perfoliatus var. ovalifolius Wimm. & Grab.; Fl. Siles. [Wimmer & Grabowski] 141 (1827)

= Potamogeton perfoliatus var. ovatifolius Wallr.; Sched. Crit. 66 (1822), nom. inval.

= Potamogeton perfoliatus var. ovatolanceolatus (Rchb.) Blytt; Norges Fl. 1: 367 (1861)

= Potamogeton perfoliatus var. ovatus M.Loehr; Enum. Fl. Deutschland 632 (1852), nom. inval.

= Potamogeton perfoliatus var. rotundifolius Wallr.; Sched. Crit. 67 (1822)

= Potamogeton praelongus F.Muell.; Fragm. [Mueller] 8: 217 (1874), nom. illeg.

= Spirillus perfoliatus (L.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton polygonifolius Pourr.; Mém. Acad. Sci. Toulouse 3: 325 (1788)

Name: Knöterich-Laichkraut (DE), Bog Pondweed (EN)

Distribution: Faeroe Isl.; England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl., Isles of Scilly, St. Kilda Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; ?Austria; Poland; Czech Republic; Portugal; Spain; France; Channel Isl. ; Corsica; Italy; ?Sicily; Slovenia; Croatia; Montenegro; Serbia; Kosovo; Bulgaria; ?Greece; Morocco; Algeria; Tunisia; Azores (Santa Maria Isl., Sao Miguel Isl., Terceira, Graciosa, Sao Jorge, Pico, Faial, Flores Isl., Corvo Isl.); Madeira (Madeira Isl.); Canada [I] (Newfoundland [I], Nova Scotia [I]); St. Pierre et Miquelon [I]; USA [I] (New Jersey [I])

10 DEN FIN FOR GRB IRE NOR SWE 11 BGM CZE GER LUX NET POL SWI 12 CIS COR FRA POR SPA 13 BUL CRO ITA KOS MNT SLV SRB 20 ALG MOR TUN 21 AZO MDR 72 cdn spm 75 usa

Synonyms: hidden

= Potamogeton anglicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 180 (1916)

= Potamogeton cyprifolius Lowe ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 65 (1907)

= Potamogeton heterophyllus Biroli; Fl. Acon. 1: 53 (1808), nom. illeg.

= Potamogeton intermedius Cham. & Schltdl.; Linnaea 2: 221 (1827)

= Potamogeton microcarpus Boiss. & Reut.; Diagn. Pl. Nov. Hisp. 24 (1842)

= Potamogeton natans subsp. intermedius Gaudin; Fl. Helv. 1: 468 (1828), nom. illeg.

= Potamogeton natans subsp. polygonifolius (Pourr.) Bonnier & Layens; Tabl. Syn. Pl. Vasc. France 315 (1894)

= Potamogeton natans var. medius W.D.J.Koch & Ziz; Cat. Pl. Palat. 18 (1814)

= Potamogeton natans var. minor Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 839 (1823)

= Potamogeton natans var. oblongus (Viv.) C.C.Gmel.; Fl. Bad. [C.C.Gmelin] 4: 123 (1826)

= Potamogeton natans var. oblongus (Viv.) Gaudin; Fl. Helv. 1: 468 (1828), isonym

= Potamogeton natans var. parnassiifolius (Schrad. ex Mert. & W.D.J.Koch) Boenn.; Prodr. Fl. Monast. Westphal. 47 (1824)

= Potamogeton natans var. polygonifolius (Pourr.) Fiori & Paol.; Fl. Anal. Italia 1: 154 (1896)

= Potamogeton oblongus f. amphibius Fr.; Novit. Fl. Suec. Alt. 30 (1828)

= Potamogeton oblongus f. angustifolius Fr.; Novit. Fl. Suec. Alt. 30 (1828)

= Potamogeton oblongus f. cordifolius Cham. & Schltdl.; Linnaea 2: 215 (1827)

= Potamogeton oblongus f. lancifolius Cham. & Schltdl.; Linnaea 2: 215 (1827)

= Potamogeton oblongus var. cordifolius (Cham. & Schltdl.) Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 257 (1838)

= Potamogeton oblongus var. lancifolius (Cham. & Schltdl.) Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 257 (1838)

= Potamogeton oblongus var. ovato-oblongus Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 257 (1838), not validly publ.

= Potamogeton oblongus Viv.; Fl. Ital. Fragm. 1(1): t. 2 (1808)

= Potamogeton parnassiifolius Schrad. ex Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3: 839 (1823), nom. inval.

= Potamogeton polygonifolius f. lancifolius Cham. & Schltdl.; Linnaea 2: 215 (1827)

= Potamogeton polygonifolius f. largior Tiselius; Potamog. Suec. Exs. 1: no. 9 (1894)

= Potamogeton polygonifolius f. norvegicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 177 (1916)

= Potamogeton polygonifolius f. sphagnophilus Neuman; Bot. Not. 1896: 91 (1896)

= Potamogeton polygonifolius lancifolius Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 306 (1897)

= Potamogeton polygonifolius subsp. microcarpus (Boiss. & Reut.) Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton polygonifolius subvar. largior Tiselius ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 66 (1907)

= Potamogeton polygonifolius subvar. terrestris Coss. & Germ.; Fl. Descr. Anal. Paris, éd. 2: 706 (1861)

= Potamogeton polygonifolius var. amphibius (Fr.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 67 (1907)

= Potamogeton polygonifolius var. amphibius (Fr.) Hagstr.; Sver. Fl. 799 (1901)

= Potamogeton polygonifolius var. ericetorum Syme; Engl. Bot., ed. 3B, 9: 28 (1869)

= Potamogeton polygonifolius var. microcarpus A.Benn.; Ann. K.K. Naturhist. Hofmus. 1892: 287 (1892)

= Potamogeton polygonifolius var. parnassifolius (Schrad. ex Mert. & W.D.J.Koch) Gren. & Godr.; Fl. France [Grenier] 3: 313 (1856)

= Potamogeton polygonifolius var. parnassiifolius (Schrad. ex Mert. & W.D.J.Koch) Nyman; Consp. Fl. Eur. Suppl. 2: 286 (1890)

= Potamogeton polygonifolius var. terrestris (Coss. & Germ.) Rouy; Fl. France [Rouy & Foucaud] 13: 305 (1912)

species :

Potamogeton polygonus Cham. & Schltdl.; Linnaea 2(2): 184, t. 4 (1827)

Distribution: SE-Brazil (Minas Gerais, São Paulo, Rio de Janeiro); S-Brazil (Paraná, Santa Catarina); Uruguay (Durazno, Florida Prov., Salto); Argentina (Buenos Aires, Corrientes, Entre Rios, Misiones)

84 BRA 85 ARG URU

Synonyms: hidden

= Potamogeton pseudopolygonus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 81 (1916)

species :

Potamogeton praelongus Wulfen; Arch. Bot. (Leipzig) 3: 331 (1805)

Name: Gestrecktes Laichkraut, Langblättriges Laichkraut (DE), Long-stalked Pondweed (EN)

Distribution: Iceland ?Italy; Faeroe Isl.; England (C- & N-England, Wales, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl.); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Germany (Brandenburg, +Berlin, Baden-Württemberg, Bayern, +Hessen, +Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Schleswig-Holstein, +Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Spain (NE-Spain: Pyrénées); France; Slovenia; Croatia; Bosnia & Hercegovina; Albania; Bulgaria; Estonia; Latvia; Lithuania; Belarus; European Russia (C-European Russia, W-European Russia); Ukraine; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Kamchatka, Khabarovsk, Kuril Isl., Magadan); Kazakhstan; Northern Caucasus; Georgia [Caucasus]; Armenia; Turkey (NE-Anatolia); China (Heilongjiang, Jilin, Liaoning, Xinjiang); Mongolia; Japan (Hokkaido); Alaska; Greenland; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (California, Colorado, Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, South Dakota, Utah, Vermont, Washington State, Wisconsin, Wyoming)

10 DEN FIN FOR GRB IRE NOR SWE 11 AUT BGM CZE GER NET POL SWI 12 FRA SPA 13 ALB BIH BUL CRO SLV 14 BLR EST LAT LIT RUS UKR 30 SIB 31 RFE 32 KAZ 33 ARM GEO NCS 34 TUR 36 CHI 37 MON 38 JAP 70 ASK CDN GNL 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 78 USA

Synonyms: hidden

= Potamogeton acuminatus Wahlenb.; Fl. Upsal. 58 (1820), nom. illeg.

= Potamogeton flexicaulis Dethard.; Consp. Pl. Megalopol. 15 (1828), nom. illeg.

= Potamogeton flexuosus Schleich.; Cat. Pl. Helv., ed. 3: 23 (1815), et ed. 4: 27 (1821) nom. illeg.

= Potamogeton flexuosus Wredow; Oekon.-Techn. Fl. Mecklenb. [Berchtold & Opiz] 1: 255 (1811)

= Potamogeton praelongus f. angustifolius Zapal.; Rozpr. Wydz. Mat.-Przyr. Akad. Umiejetn., Dzial B, Nauki Biol., Ser. 3, 6B(46B): 247 (1906)

= Potamogeton praelongus f. brevifolius (Celak.) Hagstr.; Sver. Fl. 800 (1901)

= Potamogeton praelongus f. curvatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 251 (1916)

= Potamogeton praelongus f. elegans Tiselius; Potamog. Suec. Exs. 2: no. 85-86 (1895)

= Potamogeton praelongus f. pygmaeus Galinis; Lietuvos T.S.R. Fl. 2: 677 (1963)

= Potamogeton praelongus subvar. elegans (Tiselius) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] ed. 2(1): 481 (1913)

= Potamogeton praelongus var. angustifolius Rouy; Fl. France [Rouy & Foucaud] 13: 316 (1912)

= Potamogeton praelongus var. brevifolius Celak.; Sitzungsber. Königl. Böhm. Ges. Wiss. Prag, Math.-Naturwiss. Cl. (Vestn. Král. Ceské Spolecn. Nauk., Tr. Mat.-Prír.) 1886: 36 (1886)

= Potamogeton praelongus var. elegans (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 97 (1907)

= Potamogeton praelongus var. elegans (Tiselius) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 251 (1916)

= Potamogeton praelongus var. ellipticifolius Rouy; Fl. France [Rouy & Foucaud] 13: 316 (1912)

= Potamogeton praelongus var. magninii Rouy; Fl. France [Rouy & Foucaud] 13: 316 (1912)

= Potamogeton praelongus var. stipularis Rouy; Fl. France [Rouy & Foucaud] 13: 316 (1912)

= Spirillus praelongus (Wulfen) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton pulcher Tuck.; Amer. J. Sci. Arts 45: 38 (1843)

Name: Spotted Pondweed (EN)

Distribution: Canada (Nova Scotia, Ontario); USA (Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Wisconsin, West Virginia)

72 CDN 74 USA 75 USA 77 USA 78 USA

Synonyms: hidden

= Spirillus pulcher (Tuck.) Nieuwl.; Amer. Midl. Naturalist 3: 16 (1913)

= Potamogeton pulcher f. amphibius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 153 (1916)

species :

Potamogeton pusillus L.; Sp. Pl. [Linnaeus] 1: 127 (1753)

Name: Zwerg-Laichkraut (DE), Lesser Pondweed (EN), Espiga de agua (Chile)

Distribution: Iceland; England (England, Wales, Isle of Man, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl., Isles of Scilly); Ireland (Ireland, Northern Ireland); Denmark; Norway; Sweden; Finland; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Liechtenstein; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; Baleares; France; Channel Isl. (Jersey); Italy; Sicily; Malta; Slovenia; Croatia; Bosnia & Hercegovina; Serbia; Kosovo; Romania; Bulgaria; European Turkey; Greece (rare mainland, Kerkyra, Andros); Crete; Estonia; Latvia; Lithuania; Belarus; European Russia (C-European Russia, W-European Russia, E-European Russia); Ukraine; Morocco; Algeria; Libya; Egypt (Desert Oases); Azores (Santa Maria Isl., Sao Miguel Isl., Sao Jorge, Flores Isl.); Madeira (Madeira Isl.); Canary Isl. (Gran Canaria, Tenerife); Mauritania; D.R.Congo [Zaire]; Chad; Sudan; Ethiopia; Eritrea; Somalia; Uganda; Kenya; Tanzania; Zambia; Malawi; Zimbabwe; Mozambique; Namibia; Botswana; South Africa (Limpopo, North-West Prov., Gauteng, Mpulamanga, Free State, KwaZulu-Natal, N-Cape Prov., W-Cape Prov., E-Cape Prov.); Lesotho; Eswatini [Swaziland]; Siberia (Altai, Buryatia, Chita, Irkutsk, Krasnoyarsk, Tuva, W-Siberia, Yakutia); Russian Far East (Khabarovsk, Primorye); Kazakhstan; Turkmenistan; Uzbekistan; Kyrgyzstan; Tajikistan; Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; Turkey (E-Anatolia, Inner Anatolia, N-Anatolia, NE-Anatolia, S-Anatolia, SSW-Anatolia, W-Anatolia); Iraq (NW-Iraq, SE-Iraq: Mesopotamia, W-Iraq: Desert); Iran (E-Iran, NE-Iran: Mts., N-Iran, W-Iran); Afghanistan (Ghazni, Ghorat, Kabul, Wardak, Parwan, Takhar); Lebanon (C-Lebanon, coastal W-Lebanon); Syria (C-Syrian Desert); Saudi Arabia (Asir); Yemen (N-Inner Yemen, W-Yemen); China (widespread); Mongolia; North Korea; South Korea; Japan (Honshu, Shikoku); Ryukyu Isl.; Taiwan; Pakistan (Pakistani Punjab); Nepal; India (Bihar, Jammu and Kashmir, Manipur, Punjab, West Bengal); Myanmar; Philippines (Luzon); New Guinea (Papua New Guinea); Alaska; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Northern Territories, Ontario, Prince Edward Isl., Québec, Saskatchewan, Yukon); USA (Alabama, Arkansas, Arizona, California, Colorado, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming); Mexico (Aguascalientes, Baja California Norte, Chiapas, Chihuahua, Colima, Ciudad de Mexico, Durango, Guanajuato, Hidalgo, Jalisco, Mexico State, Michoacán, Morelos, Puebla, Queretaro, San Luis Potosi, Sonora, Tamaulipas, Veracruz, Zacatecas); Guatemala; Belize; Honduras; Nicaragua; Costa Rica; Hispaniola (Haiti); Colombia (Antioquia, Boyacá, Cundinamarca, Risaralda, Santander); Venezuela (Carabobo, Lara, Miranda, Trujillo); Ecuador; Peru; Bolivia (Beni, Cochabamba, La Paz); NE-Brazil (Ceara, Pernambuco, Bahia, Alagoas); WC-Brazil (Goiás, Mato Grosso do Sul); SE-Brazil (Minas Gerais, São Paulo, Rio de Janeiro); S-Brazil (Paraná, Rio Grande do Sul, Santa Catarina); Paraguay (Central); Uruguay (Flores Prov., Montevideo, Rocha); Argentina (Buenos Aires, Catamarca, Cordoba, Corrientes, Entre Rios, Jujuy, La Rioja, Mendoza, Salta, Santiago del Estero, Santa Fe, San Juan, San Luis, Tucuman); Chile [I] (Antofagasta [I], Atacama [I], Valparaíso [I], Metropolitana de Santiago [I], O´Higgins [I], Maule [I], Ñuble [I], Biobío [I], Araucanía [I], Los Rios [I])

10 DEN FIN GRB ICE IRE NOR SWE 11 AUT BGM CZE GER HUN LIE LUX NET POL SLO SWI 12 BAL CIS FRA POR SPA 13 BIH BUL CRO GRC ITA KOS KRI MLT ROM SIC SLV SRB TUE 14 BLR EST LAT LIT RUS UKR 20 ALG EGY LBY MOR 21 AZO CNY MDR 22 MTN 23 ZAI 24 CHA ERI ETH SOM SUD 25 KEN TAN UGA 26 MLW MOZ ZAM ZIM 27 BOT LES NAM SAF SWZ 30 SIB 31 RFE 32 KAZ KGZ TKM TZK UZB 33 ARM AZE GEO NCS 34 AFG IRN IRQ LEB SYR TUR 35 SAU YEM 36 CHI 37 MON 38 JAP KOR NKO NNS TAI 40 IND NEP PAK 41 MYA 42 NWG PHI 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA 79 MEX 80 BLZ COS GUA HON NIC 81 HIS 82 CLM VEN 83 BOL ECU PER 84 BRA 85 ARG cle PAR URU

Remarks: many records probably belong to P. berchtoldii which was not separated in older times

Synonyms: hidden

= Buccaferrea pusilla (L.) Bubani; Fl. Pyren. [Bubani] 4: 16 (1901)

= Potamogeton aschersonii A.Benn.; J. Bot. 31: 294 (1893)

= Potamogeton aschersonii f. pusilloides Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 112 (1916)

= Potamogeton badius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 104 (1916)

= Potamogeton berteroanus Phil.; Linnaea 30: 200 (1859 publ. 1860)

= Potamogeton caespitosus Humn.; Cat. Pl. Luxeuil 60 (1876)

= Potamogeton compressus var. elongatus Wahlenb.; Fl. Suec. [Wahlenberg] 1: 107 (1824)

= Potamogeton denticulatus Link; Phys. Beschr. Canar. Ins. [Buch] 138 (1828)

= Potamogeton dualis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 103 (1916)

= Potamogeton exiguus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 106 (1916)

= Potamogeton gracilis Fr.; Novit. Fl. Suec. Alt. 50 (1828), nom. illeg.

= Potamogeton lateralis f. incompletus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 127 (1916)

= Potamogeton lateralis f. subcompletus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 127 (1916)

= Potamogeton millardii Hesl.-Harr.; Proc. Univ. Durham Philos. Soc. 10: 365 (1942)

= Potamogeton panormitanus Biv.; Nuove Piante 6 (1838)

= Potamogeton panormitanus var. major G.Fisch.; Ber. Bayer. Bot. Ges. 11: 109 (1907)

= Potamogeton panormitanus var. minor Biv.; Barone Ant. Biv.-Bern. [Andrea] 6 (1838)

= Potamogeton panormitanus var. minor Biv. ex Guss.; Fl. Sicul. Syn. 1: 207 (1842)

= Potamogeton pusilliformis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 97 (1916)

= Potamogeton pusillus proles panormitanus (And.Biv.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 116 (1907)

= Potamogeton pusillus proles tenuissimus (Hook.f.) Rouy; Fl. France [Rouy & Foucaud] 13: 321 (1912)

= Potamogeton pusillus subsp. argentinus A.Benn.; J. Bot. 46: 250 (1908)

= Potamogeton pusillus subsp. panormitanus (Biv.) Schinz & R.Keller; Fl. Schweiz [Schinz], ed. 3, 2: 16 (1914)

= Potamogeton pusillus subsp. sturrockii (A.Benn.) Hook.f.; Student´s Fl. Brit. Isl., ed. 3: 435 (1884)

= Potamogeton pusillus subvar. brevifolius (G.Mey.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 345 (1897)

= Potamogeton pusillus subvar. interruptus J.W.Robbins; Botany (Fortieth Parallel) 338 (1871)

= Potamogeton pusillus var. africanus A.Benn.; Annuaire Conserv. Jard. Bot. Genève 9: 102 (1905)

= Potamogeton pusillus var. capillaris Gaudin; Fl. Helv. 1: 479 (1828)

= Potamogeton pusillus var. capitatus A.Benn.; J. Bot. 39: 201 (1901)

= Potamogeton pusillus var. elongatus A.Benn. ex Macoun; Cat. Canad. Pl. 5: 371 (1890)

= Potamogeton pusillus var. lacunatus Fernald; Mem. Gray Herb. 3: 85 (1932)

= Potamogeton pusillus var. latifolius Celak.; Arch. Naturwiss. Landesdurchf. Böhmen 1(3) (Prodr. Fl. Böhmen 1): 23 (1867), nom. illeg.

= Potamogeton pusillus var. latifolius G.Mey.; Chloris Han. 525 (1836)

= Potamogeton pusillus var. longipedunculatus Hicken; Anales Soc. Ci. Argent. 65: 295 (1908)

= Potamogeton pusillus var. major Fr.; Novit. Fl. Suec. Alt. 48 (1828), nom. illeg.

= Potamogeton pusillus var. minor (Biv. ex Guss.) Fernald & B.G.Schub.; Rhodora 50: 154 (1949)

= Potamogeton pusillus var. panormitanus (Biv.) Nyman; Consp. Fl. Eur. 683 (1882)

= Potamogeton pusillus var. pseudorutilus A.Benn.; J. Bot. 39: 201 (1901)

= Potamogeton pusillus var. sphaerocarpus K.Schum.; Fl. Bras. [Martius] 3(3): 692 (1894)

= Potamogeton pusillus var. tenuifolius K.Schum.; Fl. Bras. [Martius] 3(3): 692 (1894)

= Potamogeton reichenbachii M.Loehr; Enum. Fl. Deutschland 633 (1852), nom. illeg.

= Potamogeton reichenbachii M.Loehr ex Beurl.; Bot. Not. 90 (1853)

= Potamogeton rutilus subsp. caespitosus (Humn.) Nyman; Consp. Fl. Eur. Suppl. 2: 288 (1890)

= Potamogeton sturrockii A.Benn.; Scott. Naturalist (Perth), n. s. 1: 27 (1883)

= Potamogeton subjavanicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 129 (1916)

= Potamogeton subtrichodes Schur; Enum. Pl. Transsilv. 633 (1866)

= Potamogeton tenuifolius F.Phil.; Anales Mus. Nac., Santiago de Chile 1891(App.): 95 (1891), nom. illeg.

= Potamogeton tenuissimus Hook.f.; Trans. Linn. Soc. London 23: 342 (1861), nom. illeg.

= Potamogeton tenuissimus M.Loehr ex Beurl.; Bot. Not. 1853: 90 (1853)

= Potamogeton trichoides Benth.; Pl. Hartw. [Bentham] 341 (1857), nom. illeg.

= Potamogeton trinervius G.Fisch.; Ber. Bayer. Bot. Ges. 11: 29 (1907), non Saporta (1888), fossil name.

= Potamogeton turionifer Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 91 (1916)

= Potamogeton turionifer var. mucronulatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 91 (1916)

= Potamogeton turionifer var. tenuis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 91 (1916)

= Potamogeton uruguayensis A.Benn. & Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 111 (1907)

= Spirillus pusillus (L.) Nieuwl.; Amer. Midl. Naturalist 3: 18 (1913)

species :

Potamogeton quinquenervius Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 130 (1916)

Distribution: Australia (New South Wales)

50 AUS

Remarks: octandrus agg.

Synonyms: hidden

= Potamogeton ×subdentatus var. petiolatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 201 (1916)

= Potamogeton ×subdentatus var. sessilis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 201 (1916)

species :

Potamogeton richardsonii (A.Benn.) Rydb.; Bull. Torrey Bot. Club 599 (1905)

Name: Richardson´s pondweed

Distribution: Russian Far East (Kamchatka, Khabarovsk, Magadan, Primorye, Sakhalin); Alaska; Canada (Alberta, British Columbia, Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Nunavut, Ontario, Québec, Saskatchewan, Yukon); USA (Arizona, California, Colorado, Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, South Dakota, Utah, Vermont, Washington State, Wisconsin, Wyoming)

31 RFE 70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 77 USA 78 USA

Synonyms: hidden

= Potamogeton perfoliatus subsp. richardsonii (A.Benn.) Hultén; Fl. Alaska & Yukon 102 (1942)

= Potamogeton perfoliatus var. lanceolatus J.W.Robbins; Manual [A.Gray] ed. 5: 488 (1867), nom. illeg., non Blytt

= Potamogeton perfoliatus var. richardsonii A.Benn.; J. Bot. 27: 25 (1889)

= Potamogeton perfoliatus var. sachalinensis H.Lév.; Repert. Spec. Nov. Regni Veg. 8: 285 (1910)

= Potamogeton sachalinensis (H.Lév.) H.Lév.; Repert. Spec. Nov. Regni Veg. 10: 441 (1912)

= Spirillus perfoliatus var. richardsonii (A.Benn.) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton robbinsii Oakes; Mag. Hort. Bot. 7: 180 (1841)

Name: Robbins´ pondweed

Distribution: Alaska; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Nunavut, Ontario, Québec, Saskatchewan); USA (Alabama, California, Colorado, Connecticut, District of Columbia, Delaware, Idaho, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, Rhode Island, Utah, Virginia, Vermont, Washington State, Wisconsin, Wyoming)

70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 78 USA

Synonyms: hidden

= Potamogeton pumilum Nutt. ex A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 293 (in syn.) (1892)

= Potamogeton robbinsii f. cultellatus Fassett; Rhodora 35: 389 (1933)

= Spirillus robbinsii (Oakes) Nieuwl.; Amer. Midl. Naturalist 3: 19 (1913)

species :

Potamogeton rutilus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 362 (1827)

Name: Rötliches Laichkraut (DE), Shetland Pondweed (EN)

Distribution: England (Scotland, Outer Hebrides, Shetland Isl.); Denmark; Sweden; Finland; Germany (Brandenburg, +Berlin, Bayern, +Hamburg, +Mecklenburg-Vorpommern, +Niedersachsen, Schleswig-Holstein, +Sachsen-Anhalt); Poland; France; ?Romania; Estonia; Latvia; Lithuania; Belarus; European Russia (N-European Russia, C-European Russia, W-European Russia); ?Ukraine; Siberia (W-Siberia, Yakutia)

10 DEN FIN GRB SWE 11 GER POL 12 FRA 14 BLR EST LAT LIT RUS 30 SIB

Synonyms: hidden

= Potamogeton caespitosus Nolte; Fl. Dan. [Oeder et al.] t. 2889 (1877), nom. illeg.

= Potamogeton grisebachii Heuff.; Verh. K.K. Zool.-Bot. Ges. Wien 8: 200 (1858)

= Potamogeton pusillus var. reptans (Humn.) Rouy; Fl. France [Rouy & Foucaud] 13: 321 (1912)

= Potamogeton reptans Humn.; Cat. Pl. Luxeuil 61 (1876)

= Potamogeton rutilus f. simplicissimus Tiselius; Potamog. Suec. Exs. 3: no. 105-106, notulae p. 5 (1897)

= Potamogeton rutilus var. grisebachii (Heuff.) Nyman; Consp. Fl. Eur. 683 (1882)

= Potamogeton rutilus var. reptans (Humn.) Nyman; Consp. Fl. Eur. Suppl. 2: 288 (1890)

species :

Potamogeton sarmaticus Mäemets; Novosti Sist. Vyssh. Rast. 15: 4 (1979)

Distribution: Ukraine; Siberia (W-Siberia)

14 UKR 30 SIB

species :

Potamogeton schweinfurthii A.Benn.; Fl. Trop. Afr. [Oliver et al.] 8: 220 (1901)

Distribution: Greece (Lefkada, Milos, Limnos); E-Crete (very rare); Algeria; Tunisia; Libya; Egypt (Eastern Desert, NE-Egypt, Nile Delta, NW-coastal Egypt); Azores [I] (Sao Miguel Isl. [I]); Senegal; Mali; Burkina Faso; Niger; Cameroon; D.R.Congo [Zaire]; Rwanda; ?Burundi; SW-Chad; ?Sudan; South Sudan; Ethiopia; Eritrea; Somalia; Uganda; Kenya; Tanzania; Zambia; Malawi; Zimbabwe; Mozambique; Namibia; Botswana; South Africa (Limpopo, North-West Prov., Gauteng, Mpulamanga, KwaZulu-Natal, N-Cape Prov., W-Cape Prov., E-Cape Prov.); Lesotho; Eswatini [Swaziland]; Madagascar; United Arab Emirates; Yemen

13 GRC KRI 20 ALG EGY LBY TUN 21 azo 22 BKN MLI NGR SEN 23 CMN RWA ZAI 24 CHA ERI ETH SOM SSU 25 KEN TAN UGA 26 MLW MOZ ZAM ZIM 27 BOT LES NAM SAF SWZ 29 MDG 35 UAE YEM

Synonyms: hidden

= Potamogeton capensis Schelle ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 203 (1916)

= Potamogeton promontoricus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 182 (1916)

= Potamogeton repens Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 170 (1916)

= Potamogeton venosus A.Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 52 (1924)

species :

Potamogeton sclerocarpus K.Schum.; Fl. Bras. [Martius] 3(3): 688 (1894)

Distribution: NE-Brazil (Bahia); WC-Brazil (Goiás); SE-Brazil (Minas Gerais)

84 BRA

species :

Potamogeton sibiricus A.Benn.; J. Bot. 28: 300 (1890)

Name: Yenisei River pondweed

Distribution: Siberia (Buryatia, Irkutsk, Krasnoyarsk, Yakutia); Russian Far East (Kamchatka, Magadan); Alaska; Canada (Manitoba, Northern Territories, Nunavut, Ontario, Québec, Yukon)

30 SIB 31 RFE 70 ASK CDN 71 CDN 72 CDN

Synonyms: hidden

= Potamogeton anadyrensis V.N.Vassil.; Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 17: 45 (1955)

= Potamogeton porsildiorum Fernald; Mem. Amer. Acad. Arts, n. s. 17: 40 (1932)

= Potamogeton sibiricus subsp. subsibiricus (Hagstr) Tzvelev; Novosti Sist. Vyssh. Rast. 32: 182 (2000)

= Potamogeton subsibiricus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 84 (1916)

species :

Potamogeton skvortsovii Klinkova; Byull. Glavn. Bot. Sada 168: 48 (1993)

Distribution: European Russia (SE-European Russia); Kazakhstan

14 RUS 32 KAZ

species :

Potamogeton solomonensis Wiegleb; Blumea 37(2): 381 (1993)

Distribution: Solomon Isl.

43 SOL

species :

Potamogeton spirilliformis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 137 (1916)

Distribution: S-Brazil (Rio Grande do Sul); Uruguay (Rocha); Argentina (Buenos Aires, Corrientes, Entre Rios); Chile (Valparaiso)

84 BRA 85 ARG CLE URU

Synonyms: hidden

= Potamogeton reniacoensis Sparre; Bol. Soc. Argent. Bot. 6: 107 (1956)

species :

Potamogeton spirillus Tuck.; Amer. J. Sci. Arts, Ser. 2, 6: 228 (1848)

Name: Spiral pondweed

Distribution: Canada (Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Québec); USA (Connecticut, Delaware, Iowa, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Dakota, Virginia, Vermont, Wisconsin, West Virginia)

71 CDN 72 CDN 74 USA 75 USA 78 USA

Synonyms: hidden

= Potamogeton heterophyllus Elliott; Sketch Bot. S. Carolina [Elliott] 1: 222 (1817), nom. illeg.

= Potamogeton hybridus Michx.; Fl. Bor.-Amer. [Michaux] 1: 101 (1803), nom. illeg.

= Potamogeton spirillus var. curvifolius Peck; Rep. (Annual) Regents Univ. State New York New York State Mus. 49: 28 (1896)

species :

Potamogeton strictifolius A.Benn.; J. Bot. 42: 148 (1902)

Name: Narrowleaf pondweed

Distribution: Siberia (Yakutia); Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northern Territories, Ontario, Québec, Saskatchewan, Yukon); USA (Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maine, Michigan, Minnesota, North Dakota, Nebraska, New Hampshire, New York, Ohio, Pennsylvania, South Dakota, Utah, Virginia, Vermont, Wisconsin, Wyoming)

30 SIB 70 CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 78 USA

Synonyms: hidden

= Potamogeton longiligulatus Fernald; Mem. Gray Herb. 3: 66 (1932)

= Potamogeton pusillus var. rutiloides (Fernald) Boivin; Naturaliste Canad. 94: 527 (1967)

= Potamogeton strictifolius var. rutiloides Fernald; Mem. Gray Herb. 3: 57 (1932)

species :

Potamogeton suboblongus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 182 (1916)

Distribution: New Zealand (incl. Stewart Isl.)

51 NZL

species :

Potamogeton sulcatus A.Benn.; Ann. K.K. Naturhist. Hofmus. 7: 294 (1892)

Distribution: Australia (SE-South Australia, Tasmania, New South Wales, SE-Queensland)

50 AUS

species :

Potamogeton sumatranus Miq.; Fl. Ned. Ind., Eerste Bijv. 597 (1861)

Distribution: Sumatra

42 SUM

species :

Potamogeton tennesseensis Fernald; Rhodora 38: 167 (1936)

Name: Tennessee pondweed

Distribution: USA (Kentucky, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia)

75 USA 78 USA

Synonyms: hidden

= Potamogeton purshii Tuck. ex Jennison; Rhodora 37: 313 (1935), nom. illeg.

species :

Potamogeton tenuicaulis F.Muell.; Fragm. [Mueller] 1: 90, 244 (1858)

Distribution: Java; New Guinea; Australia (N-Western Australia, Northern Territory, Queensland, New South Wales)

42 JAW NWG 50 AUS

Remarks: octandrus agg.

Synonyms: hidden

= Potamogeton javanicus Hassk.; Acta Soc. Regiae Sci. Indo-Neêrl. 1(8): 26 (1856)

= Potamogeton javanicus var. major Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 161 (1907)

= Potamogeton ligulatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 131 (1916)

species :

Potamogeton tepperi A.Benn.; J. Bot. 25: 178 (1887)

Distribution: India [I] (Meghalaya [I], Jammu & Kashmir [I]); Australia (Northern Territory, N-Western Australia, Queensland)

40 ind 50 AUS

species :

Potamogeton thunbergii Cham. & Schltdl.; Linnaea 2: 221 (1827)

Distribution: SE-Nigeria; W-Cameroon; E-D.R.Congo [Zaire]; Rwanda; Ethiopia; Eritrea; Uganda; Kenya; Tanzania; Angola; Zambia; Malawi; Zimbabwe; Namibia; Botswana; South Africa (Limpopo, North-West Prov., Gauteng, Mpulamanga, Free State, KwaZulu-Natal, W-Cape Prov., E-Cape Prov.); Eswatini [Swaziland]; Madagascar

22 NGA 23 CMN RWA ZAI 24 ERI ETH 25 KEN TAN UGA 26 ANG MLW ZAM ZIM 27 BOT NAM SAF SWZ 29 MDG

Synonyms: hidden

= Potamogeton americanus var. richardii (Solms) Solms ex Schweinf.; Bull. Herb. Boissier 2(App. 2): 8 (1894)

= Potamogeton fibrosus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 160 (1916)

= Potamogeton richardii Solms; Beitr. Fl. Aethiop. [Schweinfurth] 194, 292 (1867)

species :

Potamogeton tricarinatus F.Muell. & A.Benn. ex A.Benn.; J. Bot. 30: 229 (1892)

Distribution: Australia (S-Queensland, N-New South Wales); New Caledonia; Vanuatu

50 AUS 60 NWC VAN

Synonyms: hidden

= Potamogeton odontocarpus Gand.; Bull. Soc. Bot. France 46: 393 (1900)

= Potamogeton muricatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 165 (1916)

= Potamogeton similis A.Benn.; J. Bot. 40: 146 (1902)

species :

Potamogeton trichoides Cham. & Schltdl.; Linnaea 2: 175 (1827)

Name: Haarblättriges Laichkraut (DE), Hair-like Pondweed (EN)

Distribution: England (England, Wales, S-Scotland); Denmark; Sweden; Netherlands; Belgium; Luxembourg; Germany (Brandenburg, +Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Saarland, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Poland; Czech Republic; Slovakia; Hungary; Portugal; Spain; France; +Monaco; Channel Isl.; Italy; Sicily; Slovenia; Croatia; Bosnia & Hercegovina; Serbia; Kosovo; Albania; Romania; Bulgaria; European Turkey; Greece (very rare mainland, Tinos); Crete; Estonia; Latvia; Lithuania; Belarus; European Russia (C-European Russia, W-European Russia, E-European Russia); Ukraine; Morocco; Algeria; Egypt (Nile Valley); Canary Isl. (Tenerife, Gran Canaria); Zimbabwe; Botswana; South Africa (Limpopo, Gauteng, Mpulamanga, Free State, KwaZulu-Natal, W-Cape Prov., E-Cape Prov.); Siberia (Altai, Krasnoyarsk, W-Siberia); Kazakhstan; Uzbekistan; Northern Caucasus; Armenia; Azerbaijan; Turkey (Inner Anatolia, N-Anatolia, NE-Anatolia, SW-Anatolia); Lebanon (Antilebanon); Israel (coastal W-Israel, Negev Desert); Myanmar

10 DEN GRB SWE 11 AUT BGM CZE GER HUN LUX NET POL SLO SWI 12 CIS FRA MCO POR SPA 13 ALB BIH BUL CRO GRC ITA KOS KRI ROM SIC SLV SRB TUE 14 BLR EST LAT LIT RUS UKR 20 ALG EGY MOR 21 CNY 26 ZIM 27 BOT SAF 30 SIB 32 KAZ UZB 33 ARM AZE NCS 34 ISR LEB TUR 41 MYA

Synonyms: hidden

= Potamogeton baenitzii Gand.; Oesterr. Bot. Z. 31: 19 (1881)

= Potamogeton condylocarpus Tausch; Flora 19: 423 (1836)

= Potamogeton danicus Gand.; Oesterr. Bot. Z. 31: 18 (1881)

= Potamogeton monogynus J.Gay; Suppl. Cat. Pl. Paris 89 (1843)

= Potamogeton orthorrhynchus Gand.; Oesterr. Bot. Z. 31: 18 (1881)

= Potamogeton perneglectus Gand.; Oesterr. Bot. Z. 31: 18 (1881)

= Potamogeton phialae Post; Bull. Herb. Boissier 1: 409 (1893)

= Potamogeton pusillus subsp. trichoides (Cham. & Schltdl.) Bonnier & Layens; Tabl. Syn. Pl. Vasc. France 315 (1894)

= Potamogeton pusillus var. trichoides (Cham. & Schltdl.) Bolzon; Bull. Soc. Bot. Ital. 1897: 53 (1897)

= Potamogeton trichoides var. leiocarpus Asch.; Fl. Brandenburg 1(2): 665 (1864)

= Potamogeton trichoides var. monogynus (J.Gay) Magnin; Bull. Soc. Bot. France 43: 447 (1896)

= Potamogeton trichoides var. tuberculatus (Ten. & Guss.) Nyman; Consp. Fl. Eur. 683 (1882), isonym

= Potamogeton trichoides var. tuberculatus (Ten.) Asch.; Fl. Brandenburg 1(2): 665 (1864)

= Potamogeton trichoides var. tuberculosus Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 13 (1845)

species :

Potamogeton tubulatus Hagstr.; S. Tibet [Hedin] 6(3): 96 (1922)

Distribution: Tajikistan

32 TZK

species :

Potamogeton ulei K.Schum.; Fl. Bras. [Martius] 3(3): 690 (1894)

Distribution: S-Brazil (Paraná, Rio Grande do Sul, Santa Catarina)

84 BRA

species :

Potamogeton vaseyi Robbins ex A.Gray; Manual [A.Gray], ed. 5: 485 (1867)

Name: Vasey´s pondweed

Distribution: Canada (New Brunswick, Ontario, Québec); USA (Connecticut, Iowa, Illinois, Indiana, Massachusetts, Maine, Michigan, Minnesota, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Vermont, Wisconsin)

72 CDN 74 USA 75 USA

Synonyms: hidden

= Potamogeton lateralis Morong; Bot. Gaz. 5: 51 (1880)

= Potamogeton vaseyi var. latifolius Morong; Mem. Torrey Bot. Club 3(3): 44 (1893)

species :

Potamogeton wrightii Morong; Bull. Torrey Bot. Club 13: 158 (1886)

Distribution: Japan; Ryukyu Isl.; Taiwan; Pakistan; India (Jammu & Kashmir, West Bengal); Bangladesh; Myanmar (Shan); Thailand; Laos; Vietnam; peninsular Malaysia; Sumatra; Borneo; Sulawesi; Palawan; Philippines (Luzon, Mindoro, Samar, Mindanao); Java; Lesser Sunda Isl. (Lombok, ?Flores); Moluccas (Halmaheira); New Guinea (Irian Jaya, Papua New Guinea); ?Bismarck Arch. (?New Hanover); Northern Marianas

38 JAP NNS TAI 40 BAN IND PAK 41 LAO MYA THA VIE 42 BOR JAW LSI MLY MOL NWG PHI PLW SUL SUM 62 MRN

Synonyms: hidden

= Potamogeton hindostanicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 155 (1916)

= Potamogeton japonicus A.Benn.; J. Bot. 30: 228 (1892)

= Potamogeton jeholensis Kitag.; J. Jap. Bot. 44: 182 (1969), non Yabe (1935), fossil name.

= Potamogeton malaianus var. latifolius Nakai ex Mori; Enum. Pl. Corea 32 (1922)

= Potamogeton miyakezimensis Honda; Bot. Mag. (Tokyo) 50: 435 (1936)

= Potamogeton mucronatus C.Presl; Abh. Königl. Böhm. Ges. Wiss. 6: 245 (1851)

= Potamogeton tretocarpus Maxim. ex A.Benn.; J. Bot. 29: 154 (1891)

= Zannichellia pedunculata Fuss; Ber. Phan. Fl. Siebenb. 13 (1854), nom. illeg.

species :

Potamogeton zosteriformis Fernald; Mem. Amer. Acad. Arts, n. s. 17: 36 (1932)

Name: Flatstem pondweed (EN)

Distribution: Alaska; Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Northern Territories, Ontario, Québec, Saskatchewan, Yukon); USA (California, Connecticut, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, South Dakota, Utah, Virginia, Vermont, Washington State, Wisconsin, West Virginia, Wyoming)

70 ASK CDN 71 CDN 72 CDN 73 USA 74 USA 75 USA 76 USA 78 USA

Synonyms: hidden

= Potamogeton zosterifolius subsp. zosteriformis (Fernald) Hultén; Kungl. Svenska Vetenskapsakad. Handl., Ser. 4, 8(5): 168 (1962)

species :

Potamogeton ×absconditus Z.Kaplan, Fehrer & Hellq.; Syst. Bot. 34(4): 631 (2009)

Distribution: USA (Vermont, Maine)

75 USA

Remarks: Potamogeton perfoliatus x P. richardsonii

species :

Potamogeton ×aemulans Z.Kaplan, Hellq. & Fehrer; Syst. Bot. 34(4): 628 (2009)

Distribution: USA (Connecticut, Massachusetts)

75 USA

Remarks: Potamogeton bicupulatus x P. epihydrus

species :

Potamogeton ×anguillanus Koidz.; Bot. Mag. (Tokyo) 43: 398 (1929)

Distribution: China (Hubei); Japan

36 CHI 38 JAP

Remarks: Potamogeton perfoliatus x wrightii

Synonyms: hidden

= Potamogeton ×intortusifolius J.B.He; Bull. Bot. Lab. N. E. Forest. Inst., Harbin 8(3): 125-126, f. 1a (1988)

species :

Potamogeton ×angustifolius J.Presl; Prír. Rostlin Aneb. Rostl. 19 (1823)

Name: Schmalblättriges Laichkraut (DE), Long-leaved Pondweed (EN)

Distribution: England (England, Wales, Scotland, Orkney Isl.); Ireland (Ireland, Northern Ireland); Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hessen, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Sachsen, Sachsen-Anhalt, Thüringen); Switzerland; Austria; Hungary; Portugal; France; Estonia; Latvia; Lithuania; European Russia; Siberia (W-Siberia); Tibet; NW-India (Jammu & Kashmir); etc.

10 GRB IRE 11 AUT GER HUN SWI 12 FRA POR 14 EST LAT LIT RUS 30 SIB 36 TIB 40 IND

Remarks: Potamogeton gramineus L. x Potamogeton lucens L.

Synonyms: hidden

= Potamogeton gramineus f. fluvialis Fr.; Novit. Fl. Suec. Alt. 37 (1828)

= Potamogeton gramineus f. fluviatilis Cham. ex Fr.; Novit. Fl. Suec. Alt. 37 (1828)

= Potamogeton gramineus subsp. zizii (Cham. & Schltdl.) K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton gramineus var. fluviatilis Fr.; Novit. Fl. Suec. Alt. 37 (1828)

= Potamogeton gramineus var. latifolius (Mert. & W.D.J.Koch) Rchb.; Fl. Germ. Excurs. 138 (1832)

= Potamogeton gramineus var. zizii (Cham. & Schltdl.) W.D.J.Koch; Syn. Fl. Germ. Helv. 675 (1837)

= Potamogeton heterophyllus var. elongatus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 845 (1823), nom. inval.

= Potamogeton heterophyllus var. fluviatilis Cham.; Syn. Fl. Germ. Helv. 845 (1823), nom. inval.

= Potamogeton heterophyllus var. fluviatilis Schltdl.; Fl. Berol. [Schlechtendal] 1: 116 (1823)

= Potamogeton heterophyllus var. latifolius Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 845 (1823)

= Potamogeton lindenbergii Lehm. ex Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 81 (1907)

= Potamogeton lucens f. longipedunculatus Tiselius; Potamog. Suec. Exs. 2: no. 64 (1895)

= Potamogeton lucens subsp. zizii (Mert. & W.D.J.Koch) Nyman; Consp. Fl. Eur. 682 (1882)

= Potamogeton lucens var. coriaceus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 850 (1823)

= Potamogeton lucens var. zizii (Mert. & W.D.J.Koch) Asch.; Fl. Brandenburg 1(2): 660 (1864)

= Potamogeton proteus subsp. zizii Cham. & Schltdl.; Linnaea 2(2): 197 (1827)

= Potamogeton ×angustifolius f. longipedunculatus (Tiselius) A.A.Bobrov & Chemeris; Novosti Sist. Vyssh. Rast. 38: 26 (2006)

= Potamogeton ×angustifolius J.Presl ex Opiz; Böhm. Phan. Crypt. Gew. 23 (1823)

= Potamogeton ×heidenreichii Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 327 (1897)

= Potamogeton ×zizii f. pulcherrimus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 214 (1916)

= Potamogeton ×zizii f. riparius G.Fisch. ex E.Baumann; Arch. Hydrobiol. Planktonk., Suppl. 1(Veg. Untersees): 95 (1911)

= Potamogeton ×zizii Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 845 (1823), nom. inval. ex Roth, 531 (1827)

= Potamogeton ×zizii var. gracilis A.Benn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 83 (1907)

= Potamogeton ×zizii var. porrectifolius A.Benn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 83 (1907)

= Potamogeton ×zizii W.D.J.Koch ex Roth; Enum. Pl. Phan. Germ. 1(1): 531 (1827), nom. illeg.

= Spirillus ×zizii (Mert. & W.D.J.Koch) Nieuwl.; Amer. Midl. Naturalist 3: 17 (1913)

species :

Potamogeton ×apertus Miki; Bot. Mag. (Tokyo) 49: 690 (1935)

Distribution: Japan

38 JAP

Remarks: Potamogeton oxyphyllus x P. pusillus

species :

Potamogeton ×argutulus Hagstr.; Bot. Not. 106 (1908)

Distribution: USA (District of Columbia, Massachusetts, Maine, New Hampshire, New York, West Virginia)

75 USA 78 USA

Remarks: Potamogeton gramineus x P. nodosus

Synonyms: hidden

= Potamogeton ×argutulus var. nodosifolius A.Benn.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 220 (1916)

species :

Potamogeton ×assidens Z.Kaplan, Zalewska-Gal. & Ronikier; Taxon 59(2): 562 (2010)

Distribution: Poland; Niger; Sudan; Madagascar

11 POL 22 NGR 24 SUD 29 MDG

Remarks: Potamogeton nodosus x perfoliatus

species :

Potamogeton ×attenuatus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 112 (1916)

Distribution: S-Brazil

84 BRA

Remarks: Potamogeton polygonus x P. pusillus

Synonyms: hidden

= Potamogeton ×attenuatus var. polygoniformis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 113 (1916)

species :

Potamogeton ×babingtonii A.Benn.; J. Bot. 32: 205 (1894)

Distribution: England; Lithuania; European Russia; etc.

10 GRB 14 LIT RUS

Remarks: Potamogeton lucens L. x Potamogeton praelongus Wulfen

species :

Potamogeton ×bambergensis G.Fisch.; Ber. Bayer. Bot. Ges. 11: 28 (1907)

Distribution: Europe; Lithuania; etc.

14 LIT

Remarks: Potamogeton acutifolius x compressus

species :

Potamogeton ×belorussicus D.Dubovik; Fl. Belarusi 57 (2013)

Distribution: Belarus; etc.

14 BLR

Remarks: Potamogeton compressus x P. friesii

species :

Potamogeton ×bennettii Fryer; J. Bot. 33: 348 (1895)

Distribution: England; France; etc.

10 GRB 12 FRA

Remarks: Potamogeton crispus x P. trichoides

species :

Potamogeton ×billupsii Fryer; J. Bot. 31: 353, t. 337-338 (1893)

Distribution: England

10 GRB

Remarks: Potamogeton coloratus x P. gramineus

species :

Potamogeton ×biwaensis Miki; Bot. Mag. (Tokyo) 48: 326 (1934)

Distribution: Japan

38 JAP

Remarks: Potamogeton maackianus x P. wrightii

species :

Potamogeton ×bunyonyiensis Denny & Lye; Kew Bull. 28(1): 120 (1973)

Distribution: Uganda

25 UGA

Remarks: Potamogeton schweinfurthii x thunbergii

species :

Potamogeton ×cadburyae Dandy & G.Taylor; Kew Bull. [12]: 332 (1957)

Distribution: England

10 GRB

Remarks: Potamogeton epihydrus x P. lucens

species :

Potamogeton ×clandestinus A.A.Bobrov, Zalewska-Gal. & Chemeris; Phytotaxa 149(1): 38 (2013)

Distribution: European Russia (N-European Russia); etc.

14 RUS

Remarks: Potamogeton crispus x P. natans

species :

Potamogeton ×cognatus Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 317 (1897)

Distribution: England; Denmark; Germany; Lithuania; European Russia; Canada (Nova Scotia)

10 DEN GRB 11 GER 14 LIT RUS 72 CDN

Remarks: Potamogeton perfoliatus L. x Potamogeton praelongus Wulfen

species :

Potamogeton ×confinis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 97 (1916)

Distribution: Sweden; Denmark; Netherlands; etc.

10 DEN SWE 11 NET

Remarks: Potamogeton friesii x P. pusillus

species :

Potamogeton ×cooperi (Fryer) Fryer; Rep. Bot. Exch. Club Brit. Isles 1895: 497 (1897)

Distribution: England; Czech Republic; Lithuania; Saudi Arabia; etc.

10 GRB 11 CZE 14 LIT 35 SAU

Remarks: Potamogeton crispus L. x Potamogeton perfoliatus L.

Synonyms: hidden

= Potamogeton ×cymatodes Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 337 (1897), nom. superfl.

= Potamogeton ×cymbifolius G.Fisch.; Ber. Bayer. Bot. Ges. 11: 89 (1907)

= Potamogeton ×undulatus var. cooperi Fryer; J. Bot. 29: 289 (1891)

species :

Potamogeton ×drepanoides Z.Kaplan; Preslia 85(4): 467 (2013)

Distribution: Japan (Honshu)

38 JAP

Remarks: Potamogeton berchtoldii x P. oxyphyllus

species :

Potamogeton ×exilis Z.Kaplan & Uotila; Nordic J. Bot. 29(4): 478 (2011)

Distribution: Finland; etc.

10 FIN

Remarks: Potamogeton alpinus x P. natans

species :

Potamogeton ×fauriei (A.Benn.) Miki; Stud. Hist. Nat. Monuments Kyohotu 18: 43, 45 (1937)

Distribution: Japan

38 JAP

Remarks: Potamogeton compressus x oxyphyllus

Synonyms: hidden

= Potamogeton oxyphyllus var. fauriei A.Benn.; J. Bot. 42: 76 (1904)

species :

Potamogeton ×faxonii Morong; Mem. Torrey Bot. Club 3: 2 (1893) 22, t. 32

Distribution: Canada (Québec); USA (Idaho, Massachusetts, Michigan, Missouri, New York, Texas, Virginia, Vermont)

72 CDN 73 USA 75 USA 77 USA 78 USA

Remarks: Potamogeton illinoensis x Potamogeton nodosus

Synonyms: hidden

= Potamogeton alpinus var. faxonii (Morong) Stevens; Ill. Guide Fl. Pl. 96 (1910)

= Potamogeton ×champlainii A.Benn.; J. Bot. 46: 248 (1908)

= Potamogeton ×rugelii A.Benn.; J. Bot. 46: 250 (1908), nomen

species :

Potamogeton ×fluitans Roth; Tent. Fl. Germ. 1: 72 (1788)

Distribution: England; Denmark; Sweden; Netherlands; Germany (Baden-Württemberg, Bayern, Hessen, Niedersachsen, Rheinland-Pfalz, Schleswig-Holstein); Switzerland; Austria; Poland; Czech Republic; Croatia; Estonia; Latvia; Lithuania; European Russia (C-European Russia)

10 DEN GRB SWE 11 AUT CZE GER NET POL SWI 13 CRO 14 EST LAT LIT RUS

Remarks: Potamogeton lucens L. x Potamogeton natans L.

Synonyms: hidden

= Potamogeton natans subsp. fluitans (Roth) Gaudin; Fl. Helv. 1: 467 (1828)

= Potamogeton natans subsp. fluitans (Roth) Schübl. & G.Martens; Fl. Würtemberg 109 (1834)

= Potamogeton natans var. angustatus Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 838 (1823), nom. superfl.

= Potamogeton natans var. fluitans (Roth) Boenn.; Prodr. Fl. Monast. Westphal. 47 (1824)

= Potamogeton natans var. fluitans (Roth) Cham.; Adnot. Fl. Berol. [Chamisso] 4 (1815)

= Potamogeton oblongus var. fluitans (Roth) G.Mey.; Chloris Han. 520 (1836)

= Potamogeton plantagineus subsp. fluitans (Roth) Bonnier & Layens; Tabl. Syn. Pl. Vasc. France 315 (1894), nom. illeg.

= Potamogeton ×billotii F.W.Schultz; Arch. Fl. France Allem. [F.W.Schultz] 1: 61 (1844)

= Potamogeton ×crassifolius f. verrutus Fryer; Potamoget. Brit.: ? (1898)

= Potamogeton ×crassifolius Fryer; J. Bot. 28: 321 (1890)

= Potamogeton ×fluitans proles raunkiaeri G.Fisch.; Mitt. Bayer. Bot. Ges. 3(5): 103 (1914)

= Potamogeton ×fluitans f. harzii (G.Fisch.) G.Fisch.; Mitt. Bayer. Bot. Ges. 4(10): 154 (1930)

= Potamogeton ×fluitans subsp. billotii (F.W.Schultz) K.Richt.; Pl. Eur. [K.Richter] 1: 12 (1890)

= Potamogeton ×fluitans var. ambiguus Gren. & Godr.; Fl. France [Grenier] 3: 312 (1856)

= Potamogeton ×fluitans var. billotii (F.W.Schultz) Nyman; Consp. Fl. Eur. 681 (1882)

= Potamogeton ×fluitans var. ellipticus Kirschl.; Fl. Alsace 2: 114 (1851)

= Potamogeton ×fluitans var. rivularis Lange; Haandb. Danske Fl. 103 (1851)

= Potamogeton ×fluitans var. sessilis Herter; Anales Mus. Hist. Nat. Montevideo, Ser. 2, 2: 113 (1925)

= Potamogeton ×fluitans var. spathulatus Kirschl.; Fl. Alsace 2: 114 (1851)

= Potamogeton ×fluitans var. sublucens Baagøe ex Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 308 (1897)

= Potamogeton ×harzii G.Fisch.; Mitt. Bayer. Bot. Ges. 3(5): 103 (1914)

= Potamogeton ×noltei f. perlucens G.Fisch.; Ber. Bayer. Bot. Ges. 11: 57 (1907)

= Potamogeton ×noltei f. pernatans G.Fisch.; Ber. Bayer. Bot. Ges. 11: 57 (1907)

= Potamogeton ×noltei G.Fisch.; Mitt. Bayer. Bot. Ges. 37: 472 (1905), nom. illeg.

= Potamogeton ×oblongus G.Mey.; Chloris Han. 519 (1836), nom. illeg.

= Potamogeton ×raunkiaeri G.Escher; Mitt. Bayer. Bot. Ges. 3(5): 105 (1914)

= Potamogeton ×rothii A.Benn. ex G.Fisch.; Mitt. Bayer. Bot. Ges. 1(31): 362 (1904), not validly publ.

= Potamogeton ×sterilis f. pernatans (G.Fisch.) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 275 (1916)

= Potamogeton ×sterilis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 238 (1916)

= Potamogeton ×subrufus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 241 (1916)

species :

Potamogeton ×franconicus G.Fisch.; Ber. Bayer. Bot. Ges. 11: 123 (1907)

Distribution: Germany (Bayern, Niedersachsen, Sachsen); etc.

11 GER

Remarks: Potamogeton berchtoldii x trichoides

species :

Potamogeton ×gessnacensis G.Fisch.; Ber. Bayer. Bot. Ges. 11: 42 (1907)

Distribution: Germany (Bayern)

11 GER

Remarks: Potamogeton natans x polygonifolius

species :

Potamogeton ×griffithii A.Benn.; J. Bot. 21: 65 (1883)

Distribution: England; Lithuania; Canada (Alberta); USA (Wisconsin); etc.

10 GRB 14 LIT 71 CDN 74 USA

Remarks: Potamogeton alpinus x P. praelongus

Synonyms: hidden

= Potamogeton ×macvicarii A.Benn.; Ann. Scott. Nat. Hist. 1907: 106 (1907)

species :

Potamogeton ×grovesii Dandy & G.Taylor; Watsonia 6: 316 (1967)

Distribution: England; Germany (Bayern)

10 GRB 11 GER

Remarks: Potamogeton pusillus x P. trichoides

species :

Potamogeton ×hagstromii Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 51 (1924)

Distribution: Canada (Alberta, British Columbia, Ontario); USA (Colorado, Illinois, Michigan, Ohio, Wisconsin)

71 CDN 72 CDN 73 USA 74 USA 75 USA

Remarks: Potamogeton gramineus x Potamogeton richardsonii

species :

Potamogeton ×haynesii Hellq. & G.E.Crow; Brittonia 38(4): 415 (1986)

Distribution: Canada (Newfoundland, Ontario); USA (Connecticut, Illinois, Michigan, Minnesota, New York, Vermont, Wisconsin)

72 CDN 74 USA 75 USA

Remarks: Potamogeton strictifolius x zosteriformis

species :

Potamogeton ×heslop-harrisonii W.A.Clark; Proc. Univ. Durham Philos. Soc. 10: 368 (1946)

Distribution: England

10 GRB

Remarks: Potamogeton berchtoldii x P. gramineus

species :

Potamogeton ×inbaensis Kadono; Acta Phytotax. Geobot. 34(1-3): 54 (1983)

Distribution: Japan

38 JAP

Remarks: Potamogeton dentatus x P. wrightii

Synonyms: hidden

= Potamogeton ×inbaensis nothovar. pseudomalaianus Kadono; Acta Phytotax. Geobot. 34: 54 (1983)

species :

Potamogeton ×jacobsii Z.Kaplan, Fehrer & Hellq.; Telopea 13(1-2): 253 (-254) (2011)

Distribution: Australia (New South Wales)

50 AUS

Remarks: Potamogeton crispus x P. ochreatus

species :

Potamogeton ×jutlandicus Zalewska-Gal.; Nordic J. Bot. 29(4): 474 (-475) (2011), nom. nov.

Distribution: Denmark; etc.

10 DEN

Remarks: Potamogeton lucens x P. praelongus

Synonyms: hidden

= Potamogeton ×babingtonii f. danicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 247 (1916)

species :

Potamogeton ×kamogawaensis Miki; Bot. Mag. (Tokyo) 48: 328 (1934)

Distribution: Japan (Honshu, Shikoku, Kyushu)

38 JAP

Remarks: Potamogeton octandrus x P. oxyphyllus.

species :

Potamogeton ×kaplanii Kottaim.; Phytotaxa 498(1): 69 (2021), nom. nov.

Distribution: USA (New Hampshire)

75 USA

Remarks: Potamogeton gramineus x P. oakesianus

Synonyms: hidden

= Potamogeton ×mirabilis Z.Kaplan, Hellq. & Fehrer; Syst. Bot. 34(4): 630 (2009), nom. illeg.

species :

Potamogeton ×khuzestanicus S.Abbasi, Afsharz. & Dinarvand; Phytotaxa 311(1): 12 (2017)

Distribution: Iran

34 IRN

Remarks: Potamogeton crispus x P. pusillus

species :

Potamogeton ×kyushuensis Kadono & Wiegleb; J. Jap. Bot. 62(3): 76 (1987)

Distribution: Japan

38 JAP

Remarks: Potamogeton maackianus x oxyphyllus

species :

Potamogeton ×lanceolatifolius (Tiselius) C.D.Preston; Watsonia 16(4): 437 (1987)

Distribution: Germany (Niedersachsen); etc.

11 GER

Remarks: Potamogeton gramineus x polygonifolius

Synonyms: hidden

= Potamogeton gramineus f. lanceolatifolius Tiselius; Potamog. Suec. Exs. 3: no. 139 (1897)

species :

Potamogeton ×lanceolatus Sm.; Engl. Bot. [Smith & Sowerby] t. 1985 (1809)

Distribution: England; etc.

10 GRB

Remarks: Potamogeton berchtoldii x P. coloratus

Synonyms: hidden

= Potamogeton ×perpygmaeus Hagstr. ex Druce; Rep. Bot. Soc. Exch. Club Brit. Isles 6: 630 (1922 publ. 1923)

species :

Potamogeton ×leptocephalus Koidz.; Florula Satsum. 2: 102 (1931)

Distribution: Japan (Kyushu)

38 JAP

Remarks: Potamogeton maackianus x perfoliatus

variant :

var. fujiensis Kadono & S.Iida; Acta Phytotax. Geobot. 70(3): 179 (2019)

Distribution: Japan (Honshu)

38 JAP

species :

Potamogeton ×lintonii Fryer; J. Bot. 38: 366 (1900)

Distribution: England; etc.

10 GRB

Remarks: Potamogeton crispus x friesii

species :

Potamogeton ×luxurians Z.Kaplan; Preslia 85(4): 469 (2013)

Distribution: USA (Vermont, Massachusetts)

75 USA

Remarks: Potamogeton amplifolius x P. illinoensis

species :

Potamogeton ×maemetsiae Zalewska-Gal. & Ronikier; Preslia 83(2): 267 (2011)

Distribution: Estonia; Lithuania

14 EST LIT

Remarks: Potamogeton friesii x P. rutilus

species :

Potamogeton ×malainoides Miki; Stud. Hist. Nat. Monuments Kyohotu 18: 19 (1937), no latin descr.

Distribution: Japan (Honshu, Shikoku); Taiwan

38 JAP TAI

Remarks: Potamogeton distinctus x wrightii

species :

Potamogeton ×mariensis Papch.; Bot. Zhurn. (Moscow & Leningrad) 82(12): 71 (1997)

Distribution: E-European Russia

14 RUS

Remarks: Potamogeton biformis x nodosus

species :

Potamogeton ×miguelensis Dandy; Bol. Soc. Brot., Ser. 2, 44: 5 (1970)

Distribution: Azores (Sao Miguel Isl.)

21 AZO

Remarks: Potamogeton polygonifolius x pusillus

species :

Potamogeton ×mucronulatus (G.Fisch.) Papch.; Veg. Watercourses Middle-Povolzhya 33 (2001)

Distribution: Siberia (W-Siberia)

30 SIB

Remarks: Potamogeton berchtoldii x P. pusillus

Synonyms: hidden

= Potamogeton pusillus var. acutus G.Fisch.; Ber. Bayer. Bot. Ges. 11: 116 (1907)

= Potamogeton pusillus var. mucronulatus G.Fisch.; Ber. Bayer. Bot. Ges. 11: 115 (1907)

= Potamogeton ×acutus (G.Fisch.) Papch.; Veg. Watercourses Middle-Povolzhya 64 (2001)

= Potamogeton ×pseudolacunatus Papch.; Veg. Watercourses Middle-Povolzhya 64 (2001)

species :

Potamogeton ×mysticus Morong; Bot. Gaz. 5: 50 (1880)

Distribution: USA (Massachusetts, Maryland, Maine, North Carolina, Vermont)

75 USA 78 USA

Remarks: Potamogeton berchtoldii x P. perfoliatus

species :

Potamogeton ×nericus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 145 (1916)

Distribution: Norway; Sweden; Germany (Bayern, Mecklenburg-Vorpommern); Lithuania; Russian Far East (Magadan); Canada (Alberta, Manitoba, Ontario, Québec); etc.

10 NOR SWE 11 GER 14 LIT 31 RFE 71 CDN 72 CDN

Remarks: Potamogeton alpinus x P. gramineus

species :

Potamogeton ×nervigerus Wolfg. ex, Dandy & G.Taylor; Watsonia 6: 315 (1967), pro sp.

Distribution: Estonia; Lithuania; European Russia; etc.

14 EST LIT RUS

Remarks: Potamogeton alpinus Balb. x Potamogeton lucens L.

Synonyms: hidden

= Potamogeton alpinus subvar. nervigerus (Wolfg.) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 311 (1897)

= Potamogeton alpinus var. nervigerus (Wolfg.) G.Fisch.; Mitt. Bayer. Bot. Ges. 4: 153 (1930)

= Potamogeton rufescens subsp. nervigerus (Wolfg.) K.Richt.; Pl. Eur. [K.Richter] 1: 12 (1890)

= Potamogeton rufescens var. nervigerus (Wolfg.) Nyman; Consp. Fl. Eur. 681 (1882)

species :

Potamogeton ×nitens Weber; Suppl. Fl. Holsat. 5 (1787)

Name: Glanz-Laichkraut, Schimmerndes Laichkraut (DE), Bright-leaved Pondweed (EN)

Distribution: England (N- & SW-England, S-Wales, Scotland, Outer Hebrides, Orkney Isl., Shetland Isl.); Ireland (Ireland, Northern Ireland); Germany (Brandenburg, +Berlin, +Baden-Württemberg, Bayern, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Rheinland-Pfalz, Schleswig-Holstein, Sachsen, +Sachsen-Anhalt, Thüringen); Czech Republic; Portugal; Croatia; Estonia; Latvia; Lithuania; European Russia; Russian Far East (Kamchatka, Magadan); Japan; Philippines; Canada (New Brunswick, Newfoundland, Nova Scotia, Ontario); St. Pierre et Miquelon; USA (Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Virginia, Vermont); etc.

10 GRB IRE 11 CZE GER 12 POR 13 CRO 14 EST LAT LIT RUS 31 RFE 38 JAP 42 PHI 72 CDN SPM 75 USA 78 USA

Remarks: Potamogeton gramineus L. x Potamogeton perfoliatus L.

Synonyms: hidden

= Potamogeton gramineus subsp. nitens (Weber) R.C.V.Douin; Fl. Ill. France 11: 42 (1931)

= Potamogeton proteus subsp. curvifolius (Hartm.) Cham. & Schltdl.; Linnaea 2(2): 197 (1827)

= Potamogeton ×curvifolius Hartm.; Handb. Skand. Fl. 78 (1820)

= Potamogeton ×curvifolius var. palustris Mert. & W.D.J.Koch; Deutschl. Fl. [Röhling], ed. 3, 1: 846 (1823), nom. illeg.

= Potamogeton ×fallax Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] 1: 330 (1897)

= Potamogeton ×heterophyllus Fr.; Novit. Fl. Suec. Alt. 35 (1828), nom. illeg.

= Potamogeton ×involutus (Fryer) H.Groves & J.Groves; Man. Brit. Bot. [Babington], ed. 9: 440 (1904)

= Potamogeton ×lithuanicus Gorski ex Rchb.; Icon. Fl. Germ. Helv. [H.G.L.Reichenbach] 7: 19 (1845)

= Potamogeton ×lundii K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton ×nipponicus Makino; Ill. Fl. Japan 2 (1891)

= Potamogeton ×nitens f. brevior Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 224 (1916)

= Potamogeton ×nitens f. brevipes Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 226 (1916)

= Potamogeton ×nitens f. comparandus Tiselius; Potamog. Suec. Exs. 3: no. 141 (1897), nomen

= Potamogeton ×nitens f. elongatus Baagøe ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 226 (1916)

= Potamogeton ×nitens f. extensus Tiselius ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 225 (1916)

= Potamogeton ×nitens f. flumineus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 225 (1916)

= Potamogeton ×nitens f. fyrisensis Tiselius; Potamog. Suec. Exs. 1: no. 40 (1894)

= Potamogeton ×nitens f. gotlandicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 227 (1916)

= Potamogeton ×nitens f. innominatus (Tiselius) Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 223 (1916)

= Potamogeton ×nitens f. intermedius (Tiselius) Hagstr.; Sver. Fl. 797 (1901)

= Potamogeton ×nitens f. involutus Fryer; J. Bot. 34: 1 (1896)

= Potamogeton ×nitens f. jemtlandicus Tiselius; Potamog. Suec. Exs. 1: no. 38 (1894), nomen

= Potamogeton ×nitens f. lacuum Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 226 (1916)

= Potamogeton ×nitens f. laestadii Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 224 (1916)

= Potamogeton ×nitens f. maelarensis Tiselius; Potamog. Suec. Exs. 1: no. 35 (1894)

= Potamogeton ×nitens f. maritimus Tiselius; Potamog. Suec. Exs. 1: no. 42 (1894)

= Potamogeton ×nitens f. neidensis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 227 (1916)

= Potamogeton ×nitens f. obtusus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 226 (1916)

= Potamogeton ×nitens f. perfoliatifolius Tiselius; Potamog. Suec. Exs. 1: no. 41 (1894)

= Potamogeton ×nitens f. praelongifolius (Tiselius) Hagstr.; Sver. Fl. 797 (1901)

= Potamogeton ×nitens f. restrictus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 224 (1916)

= Potamogeton ×nitens f. robustior Tiselius ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 227 (1916)

= Potamogeton ×nitens f. speciosus Tiselius; Potamog. Suec. Exs. 1: no. 36 (1894)

= Potamogeton ×nitens f. spicosus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 227 (1916)

= Potamogeton ×nitens f. stenobasis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 224 (1916)

= Potamogeton ×nitens f. subovalis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 224 (1916)

= Potamogeton ×nitens f. subsimilis Tiselius ex Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 226 (1916)

= Potamogeton ×nitens f. subtilis (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 90 (1907)

= Potamogeton ×nitens f. vadosus Tiselius; Potamog. Suec. Exs. 1: no. 43 (1894)

= Potamogeton ×nitens subsp. curvifolius (Hartm.) K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton ×nitens subvar. maritimus (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 90 (1907)

= Potamogeton ×nitens subvar. praelongifolius (Tiselius) Asch. & Graebn.; Syn. Mitteleur. Fl. [Ascherson & Graebner] ed. 2(1): 496 (1913)

= Potamogeton ×nitens subvar. vadosus (Tiselius) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 90 (1907)

= Potamogeton ×nitens var. angustifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 267 (1838)

= Potamogeton ×nitens var. curvifolius (Hartm.) C.Hartm.; Handb. Skand. Fl., ed. 11: 433 (1879)

= Potamogeton ×nitens var. heterophyllus Fr.; Novit. Fl. Suec. Alt. 35 (1828)

= Potamogeton ×nitens var. innominatus Tiselius; Potamog. Suec. Exs. 1: no. 49 (1894)

= Potamogeton ×nitens var. intermedius Tiselius; Potamog. Suec. Exs. 1: no. 48 (1894)

= Potamogeton ×nitens var. lacustris (Cham.) Asch.; Fl. Brandenburg 1(2): 661 (1864)

= Potamogeton ×nitens var. latifolius Fieber; Oekon.-Techn. Fl. Böhm. [Berchtold et al.] 2(1): 267 (1838), not validly publ.

= Potamogeton ×nitens var. occidentalis Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 91 (1907)

= Potamogeton ×nitens var. praelongifolius Tiselius; Potamog. Suec. Exs. 1: no. 45-46 (1894)

= Potamogeton ×nitens var. salicifolius Fr.; Novit. Fl. Suec. Alt. 34 (1828)

= Potamogeton ×nitens var. subtilis Tiselius; Potamog. Suec. Exs. 1: no. 47 (1894)

= Potamogeton ×praelongus Bréb.; Fl. Normandie, éd. 2: 250 (1849), nom. illeg.

= Potamogeton ×subnitens Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 259 (1916)

species :

Potamogeton ×nomotoensis Kadono & Nog.; Acta Phytotax. Geobot. 42(2): 175 (1991)

Distribution: Japan

38 JAP

Remarks: Potamogeton maackianus x P. natans

species :

Potamogeton ×ogdenii Hellq. & R.L.Hilton; Syst. Bot. 8(1): 88 (1983)

Name: Ogden´s pondweed (EN)

Distribution: Canada (Ontario); USA (Connecticut, Massachusetts, New York, Vermont)

72 CDN 75 USA

Remarks: Potamogeton hillii x P. zosteriformis

Conservation Status: very rare, known from a dozen populations

species :

Potamogeton ×olivaceus Baagøe; Actes Congrès Intern. Bot., Paris 1900: 516 (1900), nomen

Distribution: Germany (Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein)

11 GER

Remarks: Potamogeton alpinus x crispus

Synonyms: hidden

= Potamogeton ×venustus Baagøe ex A.Benn.; J. Bot. 45: 375 (1907)

species :

Potamogeton ×orientalis Hagstr.; Bot. Not. 1908: 102 (1908)

Distribution: NE-India (Assam)

40 IND

Remarks: Potamogeton berchtoldii x P. oxyphyllus

Synonyms: hidden

= Potamogeton ×henryi Fernald; Mem. Gray Herb. 3: 73 (1932)

species :

Potamogeton ×philippinensis A.Benn.; Philipp. J. Sci., C 9: 342 (1914)

Distribution: Philippines (Mindanao)

42 PHI

Remarks: Potamogeton maackianus x wrightii

species :

Potamogeton ×prussicus Hagstr.; Bot. Not. 103 (1908)

Distribution: Ireland; England; Norway; Sweden; Lithuania; Canada (Alberta); USA (Vermont); etc.

10 GRB IRE NOR SWE 14 LIT 71 CDN 75 USA

Remarks: Potamogeton alpinus x P. perfoliatus

Synonyms: hidden

= Potamogeton ×johannis Hesl.-Harr.; Occas. Notes Dept. Bot. King ´s Coll. New Castle-Upon-Tyne 2: 3 (1941)

species :

Potamogeton ×pseudofriesii Dandy & G.Taylor; Kew Bull. [12]: 332 (1957)

Distribution: England; Lithuania; etc.

10 GRB 14 LIT

Remarks: Potamogeton acutifolius x P. friesii

species :

Potamogeton ×pseudosarmaticus Papch.; Veg. Watercourses Middle-Povolzhya 63 (2001)

Distribution: Siberia

30 SIB

Remarks: Potamogeton lucens x P. sarmaticus

species :

Potamogeton ×rectifolius A.Benn.; J. Bot. 40: 147 (1902)

Distribution: USA (Illinois, Ohio, Oregon)

73 USA 74 USA 75 USA

Remarks: Potamogeton nodosus x Potamogeton richardsonii

species :

Potamogeton ×ripensis Baagøe; Actes Congrès Intern. Bot., Paris 1900: 516 (1900)

Distribution: Denmark; France; etc.

10 DEN 12 FRA

Remarks: Potamogeton compressus x P. trichoides

species :

Potamogeton ×rivularis Gillot; Scrin. Fl. Select. 6: 118 (1887)

Distribution: Azores; England; France; etc.

10 GRB 12 FRA 21 AZO

Remarks: Potamogeton berchtoldii x P. polygonifolius

Synonyms: hidden

= Potamogeton rufescens subsp. rivularis (Gillot) Nyman; Consp. Fl. Eur. Suppl. 2: 287 (1890), nom. illeg.

= Potamogeton rufescens var. rivularis Hartm.; Handb. Skand. Fl. 79 (1820)

species :

Potamogeton ×salicifolius Wolfg.; Mant. 3 [Schultes & Schultes f.]: 355 (1827)

Name: Weidenblättriges Laichkraut (DE), Willow-leaved Pondweed (EN)

Distribution: England (England, SE-Wales, Scotland); Ireland (Ireland, Northern Ireland); Germany (Brandenburg, Berlin, Baden-Württemberg, Bayern, Hamburg, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz, Schleswig-Holstein, Sachsen-Anhalt, Thüringen); European Russia; Siberia (W-Siberia); etc.

10 GRB IRE 11 GER 14 RUS 30 SIB

Remarks: Potamogeton lucens x Potamogeton perfoliatus

Synonyms: hidden

= Potamogeton lucens var. decipiens (Nolte ex W.D.J.Koch) Syme; Engl. Bot., ed. 3B, 9: 39 (1869)

= Potamogeton ×burtonii E.Hopkins ex Syme; Engl. Bot., ed. 3B, 9: 39 (1869)

= Potamogeton ×decipiens Nolte ex W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 2: 779 (1844)

= Potamogeton ×decipiens var. longifolius Nyman; Consp. Fl. Eur. 682 (1882)

= Potamogeton ×decipiens var. salicifolius (Wolfg.) Nyman; Consp. Fl. Eur. Suppl. 2: 287 (1890)

= Potamogeton ×kupffieri A.Benn.; J. Bot. 66: 103 (1928)

= Potamogeton ×longifolius Bab.; Engl. Bot. Suppl., t. 2847 (1843)

= Potamogeton ×steriliformis Hagstr.; Skand. Fl. 1: 97 (1922), nomen

= Potamogeton ×torssandrii (Tiselius) Dörfl.; Exsicc. (Herb. Norm.): 3583 (1898)

= Potamogeton ×upsaliensis Tiselius; Bot. Not. 1884: 15 (1884)

species :

Potamogeton ×saxonicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 118 (1916)

Distribution: Norway; Germany; etc.

10 NOR 11 GER

Remarks: Potamogeton obtusifolius x P. pusillus

species :

Potamogeton ×schreberi G.Fisch.; Ber. Bayer. Bot. Ges. 11: 58 (1907)

Name: Schreber´s pondweed (EN)

Distribution: Germany (Bayern, Rheinland-Pfalz, Saarland); Czech Republic; Canada (British Columbia); etc.

11 CZE GER 71 CDN

Remarks: Potamogeton natans x Potamogeton nodosus

Synonyms: hidden

= Potamogeton ×perplexus A.Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 53 (1924)

species :

Potamogeton ×scoliophyllus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 164 (1916)

Distribution: Canada (Ontario, Québec); USA (Massachusetts, Michigan, Vermont, Wisconsin)

72 CDN 74 USA 75 USA

Remarks: Potamogeton amplifolius x Potamogeton illinoensis

Synonyms: hidden

= Potamogeton ×scoliophyllus f. barensis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 164 (1916)

species :

Potamogeton ×serrulifer Z.Kaplan; Preslia 85(4): 471 (2013)

Distribution: Italy

13 ITA

Remarks: Potamogeton crispus x P. schweinfurthii

species :

Potamogeton ×sparganiifolius Laest. ex Fr.; Novit. Fl. Suec. Mant., Prima 9 (1832)

Name: Igelkolbenblättriges Laichkraut (DE)

Distribution: Europe; Sweden; Germany (Brandenburg, Baden-Württemberg, Bayern, Hessen, Mecklenburg-Vorpommern, Niedersachsen, Nordrhein-Westfalen, Schleswig-Holstein); Czech Republic; Croatia; Estonia; Latvia; Lithuania; European Russia; Siberia (W-Siberia); Russian Far East (Magadan); Canada (Alberta); USA (New York); etc.

10 SWE 11 CZE GER 13 CRO 14 EST LAT LIT RUS 30 SIB 31 RFE 71 CDN 75 USA

Remarks: Potamogeton gramineus x Potamogeton natans L.

Synonyms: hidden

= Potamogeton ×dubius Tiselius; Bot. Not. 1894: 165 (1894), non A.Massal. (1850)

= Potamogeton ×tiselii K.Richt.; Pl. Eur. [K.Richter] 1: 13 (1890)

= Potamogeton natans subsp. sparganiifolius (Laest. ex Fr.) C.Hartm.; Sv. Norsk Excurs.-Fl., ed. 4: 25 (1866)

species :

Potamogeton ×spathulatus Schrad. ex W.D.J.Koch & Ziz; Cat. Pl. Palat. 5, 18 (1814)

Distribution: Germany (Niedersachsen, Rheinland-Pfalz, Saarland)

11 GER

Remarks: Potamogeton alpinus x polygonifolius

Synonyms: hidden

= Potamogeton alpinus subsp. spathulatus (Schrad. ex W.D.J.Koch & Ziz) Magnin; Bull. Soc. Bot. France 43: 444 (1897)

= Potamogeton fluitans var. spathulatus (Schrad. ex W.D.J.Koch & Ziz) F.W.Schultz; Fl. Pfalz [F.W.Schultz] 426 (1845)

= Potamogeton kochii F.W.Schultz; Arch. Fl. France Allem. [F.W.Schultz] 1: 72 (1844)

= Potamogeton natans var. spathulatus (Schrad. ex W.D.J.Koch & Ziz) Asch.; Fl. Brandenburg 3: 103 (1859)

= Potamogeton oblongorufescens Schultz; Flora 12: 230 (1829)

species :

Potamogeton ×spathuliformis (J.W.Robbins) Morong; Mem. Torrey Bot. Club 3: 2 (1892) 26 t. 35

Distribution: Canada (Ontario, Québec); USA (Arizona, Connecticut, Iowa, Idaho, Illinois, Indiana, Massachusetts, Maine, Michigan, Minnesota, Nebraska, New York, Vermont, Wisconsin)

72 CDN 73 USA 74 USA 75 USA 76 USA

Remarks: Potamogeton gramineus x Potamogeton nodosus

Synonyms: hidden

= Potamogeton angustifolius var. methyensis A.Benn.; J. Bot. 29: 151 (1891)

= Potamogeton gramineus var. spathuliformis J.W.Robbins; Manual [A.Gray] ed. 5: 487 (1867)

= Potamogeton ×deminutus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 209 (1916)

= Potamogeton ×methyensis (A.Benn.) A.Benn.; Trans. & Proc. Bot. Soc. Edinburgh 29: 50 (1924)

= Potamogeton ×pseudolucens Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 199 (1916)

= Potamogeton ×pseudozizii Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 210 (1916)

= Potamogeton ×varians Morong ex Fryer; J. Bot. 22: 33 (1884), t. 287 et 25: 308 (1892), Morong, in Mem. Torrey Bot. Club 3: 2 26 (1893)

= Potamogeton zizii var. methyensis (A.Benn.) Graebn.; Pflanzenr. [Engler], IV.11, Heft 31 (Potamoget.): 83 (1907)

species :

Potamogeton ×subobtusus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 147 (1916)

Distribution: USA (New York)

75 USA

Remarks: Potamogeton alpinus x Potamogeton nodosus

species :

Potamogeton ×subsessilis Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 190 (1916)

Distribution: USA (Massachusetts, Wisconsin)

74 USA 75 USA

Remarks: Potamogeton epihydrus x Potamogeton nodosus

species :

Potamogeton ×sudermanicus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 73 (1916)

Distribution: Germany (Mecklenburg-Vorpommern)

11 GER

Remarks: Potamogeton acutifolius x berchtoldii

species :

Potamogeton ×tosaensis Kadono, Horii & T.Yaman.; Acta Phytotax. Geobot. 68(2): 111 (2017)

Distribution: Japan (Shikoku)

38 JAP

Remarks: Potamogeton octandrus x P. pusillus

species :

Potamogeton ×undulatus Wolfg.; Mant. 3 [Schultes & Schultes f.]: 360 (1827), pro spec., Dandy & G. Taylor, Watsonia 6: 316 (1967)

Distribution: Europe; Germany (Niedersachsen, Nordrhein-Westfalen, Schleswig-Holstein); Czech Republic; Lithuania; European Russia; etc.

11 CZE GER 14 LIT RUS

Remarks: Potamogeton crispus L. x Potamogeton praelongus Wulfen

species :

Potamogeton ×variifolius Thore; Essai Chloris 47 (1803)

Distribution: Europe; Germany (Rheinland-Pfalz); etc.

11 GER

Remarks: Potamogeton berchtoldii x natans

Synonyms: hidden

= Buccaferrea ×variifolia (Thore) Bubani; Fl. Pyren. [Bubani] 4: 12 (1901)

= Potamogeton gramineus subsp. variifolius (Thore) Nyman; Consp. Fl. Eur. 682 (1882)

= Potamogeton javanicus subsp. variifolius (Thore) P.Fourn.; Quatre Fl. France 140 (1935)

= Potamogeton ×fluitans var. variifolius (Thore) Roem. & Schult.; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 504 (1818)

species :

Potamogeton ×vepsicus A.A.Bobrov & Chemeris; Bot. Zhurn. (Moscow & Leningrad) 91(1): 74 (2006)

Distribution: N-European Russia

14 RUS

Remarks: Potamogeton natans x P. praelongus

species :

Potamogeton ×versicolor Z.Kaplan, Hellq. & Fehrer; Syst. Bot. 34(4): 631 (2009)

Distribution: USA (Maine)

75 USA

Remarks: Potamogeton epihydrus x P. perfoliatus

species :

Potamogeton ×yamagataensis Kadono & Wiegleb; J. Jap. Bot. 62(3): 73 (1987)

Distribution: Japan

38 JAP

Remarks: Potamogeton natans x P. oxyphyllus

Synonyms: hidden

= Potamogeton ×pleiophyllus Hagstr.; Kungl. Svenska Vetenskapsakad. Handl., n. s. 55(5): 159 (1916)

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A complete, synonymic checklist of the Higher Plants of the World

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A complete, synonymic checklist of the Higher Plants of the World

Version 25.04 (April 17th, 2025)

Covering 356,375 accepted species,
8,782 hybrids, 48,090 accepted infraspecific taxa and 1,002,897 synonyms,
**in total 1,416,144* names**

[about 25,000 dubious, "unplaced" names and about 4,000 invalid names (Art. 24.3) like "typicus*" are deliberately omitted]

With complete, detailed distribution data (countries and regions) and literature references

Arranged in linear phylogenetic sequence reflecting true relationships

Fully searchable and continously updated

With 38,209 pictures of 15,787 species

Assembled through 40 years independently from other databases

In cooperation with Catalogue of Life

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Search

+ Family

Filter

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Family (14)

Genus (5)

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A complete, synonymic checklist of the Higher Plants of the World

Version 25.04 (April 17th, 2025)

Covering 356,375 accepted species,8,782 hybrids, 48,090 accepted infraspecific taxa and 1,002,897 synonyms,in total 1,416,144* names

[*about 25,000 dubious, "unplaced" names and about 4,000 invalid names (Art. 24.3) like "typicus" are deliberately omitted]

With complete, detailed distribution data (countries and regions) and literature references

Arranged in linear phylogenetic sequence reflecting true relationships

Fully searchable and continously updated

With 38,209 pictures of 15,787 species

Assembled through 40 years independently from other databases

In cooperation with Catalogue of Life

Covering 356,375 accepted species,
8,782 hybrids, 48,090 accepted infraspecific taxa and 1,002,897 synonyms,
**in total 1,416,144* names**

[about 25,000 dubious, "unplaced" names and about 4,000 invalid names (Art. 24.3) like "typicus*" are deliberately omitted]