# Prometheum

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{{Short description|Genus of flowering plants belonging to the stonecrop family}}
{{for|the [chemical element](/source/chemical_element)|Promethium}}
{{Automatic taxobox
|image =Prometheum chrysanthum 01.jpg
|display_parents = 2
|taxon = Prometheum
|authority = ([A.Berger](/source/Alwin_Berger)) H. Ohba
|type_species = ''Prometheum sempervivoides''
|type_species_authority = ([M.Bieb.](/source/M.Bieb.)) H.Ohba
|subdivision_ranks = Species
|subdivision =
}}

'''''Prometheum''''' is a [genus](/source/genus) of plants in the family [Crassulaceae](/source/Crassulaceae).

==Taxonomy==
The species in the genus ''Prometheum'' include:<ref name=KewPOWO>{{cite web|url= https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:12222-1|title= Prometheum (A.Berger) H.Ohba|author=<!--Not stated-->|date=n.d.|website=Plants of the World Online|publisher=The Trustees of the Royal Botanic Gardens, Kew|access-date= August 22, 2020}}</ref>

* ''[Prometheum pilosum](/source/Prometheum_pilosum)'' <small>(M.Bieb.) H.Ohba</small>
* ''[Prometheum sempervivoides](/source/Prometheum_sempervivoides)'' <small>(Fisch. ex M.Bieb.) H.Ohba</small>
* ''[Prometheum tymphaeum](/source/Prometheum_tymphaeum)'' <small>(Quézel & Contandr.) 't Hart</small>

''P. sempervivoides'' and ''P. pilosum'' were historically included in genera ''[Sedum](/source/Sedum)'' (section ''Cyprosedum''), and later ''[Rosularia](/source/Rosularia)'', but were elevated to a separate genus by Ohba (1995).{{sfn|Ohba|1978}}

==Description==
According to an experiment done on interspecific plant crosses in the family Crassulaceae, the genus ''Prometheum'' produced on average 55 seeds. Furthermore, the same experiment found that plants of the genus ''Prometheum'' formed a [comparium](/source/comparium) with each other, meaning they were capable of interbreeding.{{sfn|Hart et al|1999}}

==Distribution and habitat==
From [Anatolia](/source/Anatolia) to Iran, through the [Caucasus](/source/Caucasus).{{sfn|Ohba|1978}}

==References==
{{Reflist}}

==Bibliography==
{{refbegin}}
* {{cite journal |last1=Hart |first1=Henk ’t |last2=van Ham |first2=Roeland D.H.J. |last3=Stevens |first3=Jan F. |last4=Elema |first4=Elizabeth T. |last5=van der Klis |first5=Herman |last6=Gadella |first6=Theo W.J. |title=Biosystematic, molecular and phytochemical evidence for the multiple origin of sympetaly in Eurasian Sedoideae (Crassulaceae) |journal=Biochemical Systematics and Ecology |date=June 1999 |volume=27 |issue=4 |pages=407–426 |doi=10.1016/S0305-1978(98)00098-2|bibcode=1999BioSE..27..407H |ref={{harvid|Hart et al|1999}}}}
* {{cite journal |last1=Ohba |first1=H |title=Generic and infrageneric classification of the old world sedoideae crassulaceae |journal=Journal of the Faculty of Science University of Tokyo Section III Botany 12(4): 139-193 |date=1978 |volume=12 |issue=4 |pages=139–193}}
{{refend}}

{{Taxonbar|from=Q311000}}

Category:Crassulaceae
Category:Crassulaceae genera
Category:Taxa named by Alwin Berger

{{Crassulaceae-stub}}

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