Petrosedum is a genus of flowering plants in 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 Petrosedum albescens Petrosedum amplexicaule Petrosedum × bellardii Petrosedum × brevierei Petrosedum dianium Petrosedum × elaverinum Petrosedum erectum Petrosedum × estrelae Petrosedum forsterianum Petrosedum × henkii Petrosedum × hommelsii Petrosedum × lorenzoi Petrosedum × luteolum Petrosedum montanum Petrosedum monteferraticum Petrosedum ochroleucum Petrosedum orientale Petrosedum × pascalianum Petrosedum pruinatum Petrosedum rupestre Petrosedum sediforme Petrosedum subulatum Petrosedum tenuifolium
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(full text at ResearchGate)