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008.0000 Family Osmundaceae Martynov; Tekhno-Bot. Slovar 445 (1820)
4-6 genera, 23 species
Species listed in database: 23; hybrids: 5
= Osmundeae Hook. & Lindl. ex Duby; Bot. Gall. 1: 536 (1828)
= Osmundineae Bessey; Bot. High Schools: 377 (1880)
= Osmundoideae Sweet; Hort. Brit. [Sweet] 460 (1826)
008.0004 Genus Claytosmunda (Y.Yatabe, N.Murak. & K.Iwats.) Metzgar & Rouhan; J. Syst. Evol. 54(6): 594 (2016)
Distribution: North America, E-Asia
Species listed in database: 1
= Osmunda subgen.Claytosmunda Y.Yatabe, N.Murak. & K.Iwats.; Acta Phytotax. Geobot. 56(2): 127-128 (2005)

Search for: Claytosmunda

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species :
Claytosmunda claytoniana (L.) Metzgar & Rouhan; J. Syst. Evol. 54(6): 594 (2016)
subspecies :
subsp. claytoniana
Name: Interrupted fern
Distribution: Canada (Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isl., Québec); St. Pierre et Miquelon; USA (Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Georgia, Iowa, Illinois, Indiana, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Vermont, Wisconsin, West Virginia)
71 CDN 72 CDN SPM 74 USA 75 USA 78 USA
Synonyms: hidden
= Osmunda basilaris Spreng.; Anleit. Kenntn. Gew. 3: 160 (1804)
= Osmunda claytoniana f. dubia (Grout) Clute; Fern Bull. 13: 119 (1905)
= Osmunda claytoniana f. tomentosa Neidorf; Amer. Fern J. 39: 100 (1949)
= Osmunda claytoniana L.; Sp. Pl. [Linnaeus] 2: 1106 (1753)
= Osmunda claytoniana var. dubia Grout; Working List N. Amer. Pterid. 13, 28 (1901)
= Osmunda interrupta Michx.; Fl. Bor.-Amer. [Michaux] 2: 273 (1803)
= Osmunda monticola Wall.; Numer. List [Wallich] no. 52 (1829), nomen
= Osmundastrum claytonianum (L.) Tagawa; J. Jap. Bot. 17: 697 (1941)
= Plenasium claytonianum (L.) C.Presl; Gefässbündel Farrnkräuter 17 (1847), et Abh. Königl. Böhm. Ges. Wiss., Ser. 5, 5: 325 (1848)
= Plenasium interruptum (Michx.) C.Presl; Gefässbündel Farrnkräuter 17 (1847), et Abh. Königl. Böhm. Ges. Wiss., Ser. 5, 5: 325 (1848)
= Struthiopteris claytoniana (L.) Bernh.; J. Bot. [Schrader] 1800(2): 126 (1801)
subspecies :
subsp. vestita (Milde) Lehnert; Bot. J. Linn. Soc. 204(x): 7 of 24 (2023)
Distribution: Russian Far East (Primorye); China (Chongqing, Guizhou, Hubei, Hunan, Liaoning, Sichuan, Yunnan); North Korea; Japan; Taiwan; Pakistan; Nepal; Bhutan; India (Arunachal Pradesh, Himachal Pradesh, Meghalaya, Sikkim, Uttarakhand, West Bengal, Nagaland, Jammu & Kashmir)
31 RFE 36 CHI 38 JAP NKO TAI 40 BHU IND NEP PAK
Synonyms: hidden
= Osmunda claytoniana subsp. pilosa (Wall. ex Grev. & Hook.) Fraser-Jenk.; Pakistan Syst. 5: 107 (1991 publ. 1992)
= Osmunda claytoniana subsp. vestita (Milde) Á.Löve & D.Löve; Taxon 26(2-3): 324 (1977)
= Osmunda claytoniana var. pilosa (Wall. ex Hook. & Grev.) Ching; Fl. Reipubl. Popularis Sin. 2: 82 (1959)
= Osmunda claytoniana var. vestita Milde; Monogr. Osmund. 102 (1868)
= Osmunda monticola var. vestita Wall.
= Osmunda pilosa Wall. ex Grev. & Hook.; Bot. Misc. 3: 229 (1833)
= Osmundastrum claytonianum subsp. pilosum (Wall. ex Hook. & Grev.) Tzvelev; Sosud. Rast. Sovet. Dal´nego Vostoka 5: 24 (1991)
= Osmundastrum claytonianum var. pilosum (Wall. ex Hook. & Grev.) W.M.Chu & S.G.Lu; Acta Bot. Yunnan., Suppl. 5: 36 (1992)
= Osmundastrum claytonianum var. vestitum (Milde) Tagawa; J. Jap. Bot. 17(12): 698-699 (1941)
= Osmundastrum pilosum (Wall. ex Grev. & Hook.) Shmakov; Opred. Paporotn. Rossii (Key Ferns Russia) 20 (1999)
= Plenasium pilosum (Wall. ex Grev. & Hook.) C.Presl; Gefässbündel Farrnkräuter 17 (1847)
= Plenasium pilosum (Wall. ex Hook. & Grev.) C.Presl; Abh. Königl. Böhm. Ges. Wiss., Ser. 5, 5: 325 (1848), isonym
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A complete, synonymic checklist of the Higher Plants of the World

Version 25.08 (August 18th, 2025)

Covering 357,029 accepted species,
8,788 hybrids, 48,070 accepted infraspecific taxa and 1,004,054 synonyms,
in total 1,417,941* names

[*about 25,000 dubious, "unplaced" names and about 4,000 invalid names (Art. 24.3) like "typicus" are deliberately omitted]

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