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492.0000 Family Rubiaceae Juss.; Gen. Pl. [Jussieu] 196 (1789), nom. cons.
589 genera, ca. 14.200 spp. mostly tropics, comparably few temperate. Phylogeny: Razafimandimbison & Rydin (2024)
Species listed in database: 14370; hybrids: 47
= Aparinaceae Hoffmanns. & Link; Fl. Portug. [Hoffmannsegg] 2: 3, 38 (1813-1829)
= Asperulaceae Cham. ex Spenn.; Handb. Angew. Bot. 2: 493 (1835)
= Catesbaeaceae Martinov; Tekhno-Bot. Slovar 111 (1820)
= Cephalanthaceae Raf.; Ann. Gén. Sci. Phys. 6: 86 (1820)
= Cinchonaceae Batsch; Tab. Affin. Regni Veg. 234 (1802)
= Coffeaceae Batsch; Tab. Affin. Regni Veg. 233 (1802)
= Coutareaceae Martinov; Tekhno-Bot. Slovar 168 (1820)
= Dialypetalanthaceae Rizzini & Occhioni; Lilloa 17: 253 (1948), nom. cons.
= Galiaceae Lindl.; Intr. Nat. Syst. Bot., ed. 2: 249 (1836)
= Gardeniaceae Dumort.; Anal. Fam. Pl. 29, 32 (1829)
= Guettardaceae Batsch; Tab. Affin. Regni Veg. 235 (1802)
= Hameliaceae Mart.; Consp. Regn. Veg. [Martius] 31 (1835)
= Hedyotidaceae Dumort.; Commentat. Bot. [Dumortier] 57 (1822)
= Henriqueziaceae Bremek.; Acta Bot. Neerl. 6 (Meded. Bot. Mus. Herb. Rijks Univ. Utrecht 141): 371 (1957)
= Houstoniaceae Raf.; Good Book 21 (1840)
= Hydrophylacaceae Martinov; Tekhno-Bot. Slovar 318 (1820)
= Lippayaceae Meisn.; Pl. Vasc. Gen. [Meisner], Tab. Diagn. 156, Comm. 112 (1838)
= Lygodisodeaceae Bartl.; Ord. Nat. Pl. 123, 207 (1830)
= Naucleaceae Wernham; New Phytol. 11: 225 (1912)
= Nonateliaceae Martinov; Tekhno-Bot. Slovar 420 (1820)
= Operculariaceae Juss. ex Perleb; Vers. Arzneikr. Pfl. 207 (1818)
= Pagamaeaceae Martinov; Tekhno-Bot. Slovar 447 (1820)
= Psychotriaceae F.Rudolphi; Syst. Orb. Veg. 49 (1830)
= Randiaceae Martinov; Tekhno-Bot. Slovar 534 (1820)
= Sabiceaceae Martinov; Tekhno-Bot. Slovar 555 (1820)
= Spermacoceaceae Bercht. & J.Presl; Přir. Rostlin 256 (1820)
= Theligonaceae Dumort.; Anal. Fam. Pl. 15, 17 (1829), nom. cons.
492.3073 Genus Debia Neupane & N.Wikstr.; Taxon 64(2): 314 (2015)
Distribution: India, Indochina, S-China, Malesia
Species listed in database: 5
species :
Debia andamanica (Kurz) Neupane & N.Wikstr.; Taxon 64(2): 315 (2015)
Distribution: Andaman Isl. (South Andaman Isl.)
41 AND
Synonyms: hidden
= Hedyotis andamanica Kurz; J. Asiat. Soc. Bengal 41: 11. 811 (1872)
species :
Debia krewanhensis (Pierre ex Pit.) Neupane & N.Wikstr.; Taxon 64(2): 315 (2015)
Distribution: Laos; Vietnam; N-Thailand
41 LAO THA VIE
Synonyms: hidden
= Hedyotis krewanhensis (Pit.) P.H.Hô; Câyco Vietnam (Illustr. Fl. Vietnam) 3(1): 136 (1993)
= Oldenlandia krewanhensis Pierre ex Pit.; Fl. Indo-Chine [P.H.Lecomte et al.] 3: 142 (1922)
species :
Debia oligocephala (Pierre ex Pit.) Neupane & N.Wikstr.; Taxon 64(2): 315 (2015)
Distribution: Vietnam; N-Thailand
41 THA VIE
Synonyms: hidden
= Hedyotis oligocephala (Pierre ex Pit.) Fukuoka; Tonan Aija Kenkyu (S.E. Asian Stud.) 8(3): 327 (1970)
= Hedyotis oligocephala (Pierre ex Pit.) P.H.Hô; Câyco Vietnam (Illustr. Fl. Vietnam) 3(1): 126 (1993), isonym
= Oldenlandia oligocephala Pierre ex Pit.; Fl. Indo-Chine [P.H.Lecomte et al.] 3: 113 (1922)
species :
Debia ovatifolia (Cav.) Neupane & N.Wikstr.; Taxon 64(2): 315 (2015)
Distribution: China (Yunnan, Guizhou, Hainan); Taiwan; Pakistan (Rawalpindi); Nepal; India (almost throughout); Sri Lanka; Bangladesh; Myanmar; Thailand; Laos; Cambodia; Vietnam; peninsular Malaysia (Langkawi Isl.); Borneo; Philippines (Luzon, Mindanao); Jawa
36 CHI 38 TAI 40 BAN IND NEP PAK SRL 41 CBD LAO MYA THA VIE 42 BOR JAW MLY PHI
Synonyms: hidden
= Gonotheca ovatifolia (Cav.) Santapau & Wagh; Bull. Bot. Surv. India 5: 107 (1964)
= Hedyotis nudicaulis (Roth) Wight & Arn.; Prodr. Fl. Ind. Orient. [Wight & Arnott] 416 (1834)
= Hedyotis ovatifolia Cav.; Icon. [Cavanilles] 6: 52, t. 573, f. 1 (1801)
= Hedyotis scapigera R.Br. ex Wall.; Numer. List [Wallich] no. 881 (1829), nomen
= Hedyotis spergulacea (DC.) Steud.; Nomencl. Bot. [Steudel], ed. 2, 1: 728 (1841)
= Oldenlandia lakshnakarae Craib; Bull. Misc. Inform. Kew 1931: 442 (1931)
= Oldenlandia nudicaulis Roth; Syst. Veg., ed. 15bis [Roemer & Schultes] 3: 202 (1818)
= Oldenlandia ovatifolia (Cav.) DC.; Prodr. [A.P. de Candolle] 4: 427 (1830)
= Oldenlandia rotundifolia G.Don; Gen. Hist. 3: 531 (1834)
= Oldenlandia spergulacea DC.; Prodr. [A.P. de Candolle] 4: 428 (1830)
= Thecagonum ovatifolium (Cav.) Babu; Bull. Bot. Surv. India 11: 214 (1969 publ. 1971)
species :
Debia rosettifolia (E.T.Geddes) Wangwasit & Chantar.; Thai Forest Bull., Bot. 49(1): 128 (2021)
Distribution: N- & SW-Thailand
41 THA
Synonyms: hidden
= Oldenlandia marcanii Craib; Bull. Misc. Inform. Kew 1931: 443 (1931)
= Oldenlandia rosettifolia E.T.Geddes; Bull. Misc. Inform. Kew 1928: 242 (1928)
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A complete, synonymic checklist of the Higher Plants of the World

Version 26.08 (August 2nd, 2026)

Covering 360,349 accepted species,
8,927 hybrids, 47,544 accepted infraspecific taxa and 1,011,667 synonyms,
in total 1,428,487* names

[*about 20,000 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