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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.
492.2904 Genus Dirichletia Klotzsch; Monatsber. Königl. Preuss. Akad. Wiss. Berlin 494 (1853)
Distribution: Tropical Africa, Madagascar, Soqotra
Species listed in database: 5
= Placopoda Balf.f.; Proc. Roy. Soc. Edinburgh 11: 835 (1882)
species :
Dirichletia glaucescens Hiern; Fl. Trop. Afr. [Oliver et al.] 3: 51 (1877)
Distribution: Ethiopia; Somalia; Kenya; Tanzania
24 ETH SOM 25 KEN TAN
Synonyms: hidden
= Carphalea glaucescens (Hiern) Verdc.; Kew Bull. 28(3): 424 (1973 publ. 1974)
= Carphalea glaucescens subsp. angustifolia Verdc.; Kew Bull. 28(3): 425 (1973 publ. 1974)
= Dirichletia asperula K.Schum.; Pflanzenw. Ost-Afrikas [Engler] C 378 (1895)
= Dirichletia borziana Mattei; Boll. Reale Orto Bot. Palermo 7: 110 (1908)
= Dirichletia ellenbeckii K.Schum.; Bot. Jahrb. Syst. 33: 336 (1903)
= Dirichletia giumbensis Chiov.; Ric. Idrogeol. Bot. Entomol. Somalia Ital. Merid. [Stefanini & Paoli] 1: 1: 86 (1916)
= Dirichletia glaucescens subsp. angustifolia (Verdc.) Gereau; Novon 31(1): 179 (2023)
= Dirichletia paolii Chiov.; Ric. Idrogeol. Bot. Entomol. Somalia Ital. Merid. [Stefanini & Paoli] 1: 1: 86 (1916)
species :
Dirichletia obovata Balf.f.; Proc. Roy. Soc. Edinburgh 11: 835 (1882)
Distribution: Soqotra
24 SOC
Synonyms: hidden
= Carphalea obovata (Balf.f.) Verdc.; Kew Bull. 28(3): 427 (1973 publ. 1974)
= Dirichletia lanceolata Balf.f.; Proc. Roy. Soc. Edinburgh 11: 835 (1882)
= Dirichletia obovata var. albescens Balf.f.; Proc. Roy. Soc. Edinburgh 12: 405 (1884)
= Dirichletia venulosa Balf.f.; Proc. Roy. Soc. Edinburgh 11: 834 (1882)
species :
Dirichletia pubescens Klotzsch; Ber. Bekanntm. Verh. Königl. Preuss. Akad. Wiss. Berlin 1853: 495 (1853)
Distribution: Zambia; Malawi; Zimbabwe; Mozambique; Namibia
26 MLW MOZ ZAM ZIM 27 NAM
Synonyms: hidden
= Carphalea pubescens (Klotzsch) Verdc.; Kew Bull. 28(3): 426 (1973 publ. 1974)
= Dirichletia duemmeri Wernham; J. Bot. 55: 78 (1917)
= Dirichletia glabra Klotzsch; Ber. Bekanntm. Verh. Königl. Preuss. Akad. Wiss. Berlin 1853: 495 (1853)
= Dirichletia rogersii Wernham; J. Bot. 54: 231 (1916)
species :
Dirichletia somaliensis (Puff) Kårehed & B.Bremer; Taxon 56(4): 1075 (2007)
Distribution: Somalia
24 SOM
Synonyms: hidden
= Carphalea somaliensis Puff; Bull. Jard. Bot. Natl. Belg. 58(3-4): 297 (1988)
species :
Dirichletia virgata (Balf.f.) Kårehed & B.Bremer; Taxon 56(4): 1075 (2007)
Distribution: Samha Isl.; Soqotra
24 SOC
Synonyms: hidden
= Placopoda virgata Balf.f.; Proc. Roy. Soc. Edinburgh 11: 836 (1882)
= Placopoda virgata var. nana Balf.f.; Proc. Roy. Soc. Edinburgh 12: 405 (1884)
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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