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Rhytidocaulon is a plant genus in the family Apocynaceae, first described in 1962.〔Bally, Peter René Oscar. 1962. Candollea 18: 335〕〔(Tropicos, genus ''Rhytidocaulon'' )〕 It is native to northeastern Africa and the Arabian Peninsula ;Species〔(The Plant List, ''Rhytidocaulon'' )〕 # ''Rhytidocaulon paradoxum'' P.R.O.Bally - Ethiopia # ''Rhytidocaulon piliferum'' Lavranos - Somalia # ''Rhytidocaulon richardianum'' Lavranos - Somalia # ''Rhytidocaulon subscandens'' P.R.O.Bally - Somalia, Ethiopia # ''Rhytidocaulon tortum'' (N.E.Br.) M.G.Gilbert - Arabia ;species with undetermined affinities〔 ;Taxonomy Phylogenetic studies have shown the genus to be monophyletic, and most closely related to the ''Echidnopsis'' genus which inhabits the same region. Marginally more distantly related is a sister branch comprising the ''Pseudolithos'' genus and the widespread ''Caralluma'' stapeliads of North Africa.〔P. Bruyns, C. Klak, P. Hanacek: ''Evolution of the stapeliads (Apocynaceae-Asclepiadoideae) - repeated major radiation across Africa in an Old World group. Molecular Phylogenetics and Evolution.'' 2014. v. 77, no. 1, p. 251--263. ISSN 1055-7903.〕 == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rhytidocaulon」の詳細全文を読む スポンサード リンク
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