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311.0000 Family Celastraceae R.Br.; Voy. Terra Austral. 2: 554 (1814), nom. cons.
ca. 100 genera, ca. 1280 spp. Phylogeny: Simmons et al. 2023
Species listed in database: 1334
= Brexiaceae Loudon; Hort. Brit. [Loudon] 524 (1830)
= Canotiaceae Airy Shaw; Kew Bull. 18: 255 (1965)
= Cassiniaceae Sch.Bip.; Flora 35: 129 (1852)
= Chingithamnaceae Hand.-Mazz.; Sinensia 2: 126 (1932)
= Euonymaceae Juss. ex Bercht. & J.Presl; Přír. Rostlin Aneb. Rostlin 2(110): 438, 439 (1825)
= Hippocrateaceae Juss.; Ann. Mus. Natl. Hist. Nat. 18: 486 (1811), nom. cons.
= Lepuropetalaceae Nakai; Chosakuronbun Mokuroku [Ord. Fam. Trib. Gen. Sect. ... nov. ed.]: 243 (1943)
= Parnassiaceae Martinov; Tekhno-Bot. Slovar 456 (1820), nom. cons., Family
= Plagiopteraceae Airy Shaw; Kew Bull. 18: 266 (1965)
= Pottingeriaceae Takht.; Sist. Magnoliof. 212 (1987), Family
= Salaciaceae Raf.; Fl. Tellur. 4: 101 (1838)
= Siphonodontaceae Gagnep. & Tardieu; Notul. Syst. (Paris) 14: 102 (1951), nom. cons.
= Stackhousiaceae R.Br.; Voy. Terra Austral. 2: 555 (1814), nom. cons.
311.4511 Genus Haydenoxylon M.P.Simmons; Novon 23(2): 224 (2014), nom. nov.
Distribution: Tropical America
Species listed in database: 4
= Haydenia M.P.Simmons; Syst. Bot. 36(4): 929 (2012), nom. illeg.
species :
Haydenoxylon calzadae (Lundell) Biral; Novon 29: 75 (2021)
Distribution: Mexico (Veracruz)
79 MEX
Synonyms: hidden
= Maytenus calzadae (Lundell) J.S.Ma; Thaiszia 11(1-2): 233 (2001)
= Euonymus calzadae Lundell; Phytologia 57(7): 453 (1985)
species :
Haydenoxylon gentryi (Lundell) M.P.Simmons; Novon 23(2): 224 (2014)
Distribution: Colombia (Antioquia, Chocó, Cundinamarca, Nariño, Quindío, Risaralda, Valle); Ecuador
82 CLM 83 ECU
Synonyms: hidden
= Haydenia gentryi (Lundell) M.P.Simmons; Syst. Bot. 36(4): 929 (2012)
= Gymnosporia gentryi Lundell; Phytologia 57(5): 313 (1985)
species :
Haydenoxylon haberianum (Hammel) M.P.Simmons; Novon 23(2): 224 (2014)
Distribution: Mexico (Veracruz); Costa Rica
79 MEX 80 COS
Synonyms: hidden
= Gymnosporia haberiana Hammel; Novon 7(2): 147 (1997)
= Haydenia haberiana (Hammel) M.P.Simmons; Syst. Bot. 36(4): 929 (2012)
species :
Haydenoxylon urbanianum (Loes.) M.P.Simmons; Novon 23(2): 224 (2014)
Distribution: Colombia (Antioquia); Ecuador; Peru; Bolivia (Beni, Cochabamba, La Paz, Santa Cruz); N-Brazil (Acre)
82 CLM 83 BOL ECU PER 84 BRA
Synonyms: hidden
= Gymnosporia magnifolia (Loes.) Lundell; Phytologia 57(5): 314 (1985)
= Gymnosporia urbaniana (Loes.) Liesner; Monogr. Syst. Bot. Missouri Bot. Garden 45 (Cat. Fl. Pl. Gymn. Peru): 1254 (1993)
= Haydenia urbaniana (Loes.) M.P.Simmons; Syst. Bot. 36(4): 929 (2012)
= Maytenus magnifolia Loes.; Verh. Bot. Vereins Prov. Brandenburg 48: 176 (1906 publ. 1907)
= Rhacoma urbaniana Loes.; Repert. Spec. Nov. Regni Veg. 1: 162 (1905)
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A complete, synonymic checklist of the Higher Plants of the World


Version 26.05 (May 20th, 2026)

Covering 359,646 accepted species,
8,890 hybrids, 47,679 accepted infraspecific taxa and 1,012,517 synonyms,
in total 1,428,732* 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