Petrosedum

Petrosedum is a genus of the succulent family Crassulaceae (stonecrop family).

Taxonomy
Petrosedum is a genus in the family Crassulaceae, subfamily Sempervivoideae, tribe Semperviveae, together with two other genera. It was segregated from the very large cosmopolitan and polyphyletic genus, Sedum, where it was variously considered a series (Rupestria). It was originally described with eleven species.

Species
The following species are recognised in the genus Petrosedum:
 * Petrosedum × affomarcoi (L.Gallo & Afferni) Afferni
 * Petrosedum albescens Afferni
 * Petrosedum amplexicaule (DC.) Velayos
 * Petrosedum × bellardii L.Gallo
 * Petrosedum × brevierei (Chass. ex L.Gallo) Afferni
 * Petrosedum dianium (O.Bolòs) Afferni
 * Petrosedum × elaverinum (L.Gallo & J.-M.Tison) L.Gallo
 * Petrosedum erectum ('t Hart) Grulich
 * Petrosedum × estrelae Gideon F.Sm. & R.Stephenson
 * Petrosedum forsterianum (Sm.) Grulich
 * Petrosedum × henkii (L.Gallo) Afferni
 * Petrosedum × hommelsii ('t Hart) Niederle
 * Petrosedum × lorenzoi (Niederle) Niederle
 * Petrosedum × luteolum (Chaboiss.) Grulich
 * Petrosedum montanum (Songeon & E.P.Perrier) Grulich
 * Petrosedum monteferraticum Niederle
 * Petrosedum ochroleucum (Chaix) Niederle
 * Petrosedum orientale ('t Hart) Grulich
 * Petrosedum × pascalianum (L.Gallo) Afferni
 * Petrosedum pruinatum (Link ex Brot.) Grulich
 * Petrosedum rupestre (L.) P.V.Heath
 * Petrosedum sediforme (Jacq.) Grulich
 * Petrosedum subulatum (C.A.Mey.) Afferni
 * Petrosedum tenuifolium (Sm.) Grulich