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205.0000 Family Crassulaceae J.St.-Hil.; Expos. Fam. Nat. 2: 123 (1805), nom. cons.
Latest phylogeny: Messerschmid et al. (2020)
Species listed in database: 1689; hybrids: 176
= Cotyledonaceae Martinov; Tekhno-Bot. Slovar 168 (1820)
= Rhodiolaceae Martinov; Tekhno-Bot. Slovar 546 (1820)
= Sedaceae Roussel; Fl. Calvados, ed. 2: 291 (1806)
= Sempervivaceae Juss.; Gen. Pl. [Jussieu] 207 (1789)
= Tillaeaceae Martinov; Tekhno-Bot. Slovar 635 (1820)
205.3404 Genus Prometheum (A.Berger) H.Ohba; J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 12(4): 168 (1978)
Distribution: Caucasus region, N-Greece. The genus will have to be recombined into a greatly expanded Sedum s. l. (Messerschmid et al. 2020)
Species listed in database: 3
= Pseudorosularia Gurgen.; Zametki Sist. Geogr. Rast. 35: 10 (1978), et in Fl. Gruzii, ed. 2, 5: 310, 273 (1979)
species :
Prometheum pilosum (M.Bieb.) H.Ohba; J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 12(4): 169 (1978)
Distribution: Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan; NE-Turkey; N-Iran (Talysh)
33 ARM AZE GEO NCS 34 IRN TUR
Synonyms: hidden
= Cotyledon pubescens C.A.Mey.; Verz. Pfl. Casp. Meer. [C.A. von Meyer] 150 (1831)
= Pseudorosularia pilosa (M.Bieb.) Gurgen.; Zametki Sist. Geogr. Rast. 35: 11 (1978), et in Fl. Gruzii, ed. 2, 5: 310, 274 (1979)
= Rosularia pilosa (M.Bieb.) Boriss.; Fl. URSS [Komarov et al., eds.] 9: 117 (1939)
= Sedum pilosum M.Bieb.; Fl. Taur.-Caucas. 1: 352 (1808)
= Umbilicus pubescens G.Don; Gen. Hist. 3: 111 (1834)
species :
Prometheum sempervivoides (Fisch. ex M.Bieb.) H.Ohba; J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 12(4): 169 (1978)
Distribution: Northern Caucasus; Georgia [Caucasus]; Armenia; Azerbaijan (Talysh); Turkey; Iran
33 ARM AZE GEO NCS 34 IRN TUR
Synonyms: hidden
= Pseudorosularia sempervivoides (Fisch. ex M.Bieb.) Gurgen.; Zametki Sist. Geogr. Rast. 35: 13 (1978), et in Fl. Gruzii, ed. 2, 5: 275 (1979)
= Rosularia sempervivoides (Fisch. ex M.Bieb.) Boriss.; Fl. URSS [Komarov et al., eds.] 9: 118 (1939)
= Sedum divaricatum Schltdl. ex Ledeb.; Fl. Ross. [Ledebour] 2: 185 (1844)
= Sedum kurdistanicum Fröd.; Svensk Bot. Tidskr. 1939 33: 338 (1939)
= Sedum sempervivoides Fisch. ex M.Bieb.; Fl. Taur.-Caucas. 3: 313 (1819)
= Sedum sempervivum Ledeb. ex Spreng.; Syst. Veg., ed. 16 [Sprengel] 2: 434 (1828)
species :
Prometheum tymphaeum (Quézel & Contandr.) ´t Hart; Evol. Syst. Crassulaceae 170 (1995)
Distribution: NW-Greece (Mt. Timfi, Mt. Grammos, Mt. Vernon)
13 GRC
Synonyms: hidden
= Helladia tymphaea (Quézel & Contandr.) M.Král; Preslia 59(4): 309 (1987)
= Sedum tymphaeum Quézel & Contandr.; Candollea 20: 62 (1965) (tympheum), designat. typi omissa, et in Taxon 16: 240 (1967) (cum typo)
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A complete, synonymic checklist of the Higher Plants of the World

Version 25.12 (Dec. 21st, 2025)

Covering 358,226 accepted species,
8,847 hybrids, 48,003 accepted infraspecific taxa and 1,006,142 synonyms,
in total 1,421,218* 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