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''Beckwithia'' is a genus of plants of the buttercup family. Most botanists consider it synonymous to a clade consisting of ''Ranunculus glacialis''〔(【引用サイトリンク】work=Alaska Natural Heritage Program )〕 and ''Ranunculus andersonii''. ''B. glacialis'' has several distinct forms that may also be considered subspecies or closely related species. However, molecular studies have supported the placement of ''B. glacialis'' and ''B. camissonis'' within ''Ranunculus'', distant from ''B. andersonii''.〔Elvira Hörandl, et. al. Phylogenetic relationships and evolutionary traits in Ranunculus s.l. (Ranunculaceae) inferred from ITS sequence analysis. Molecular Phylogenetics and Evolution 36 (2005) 305–327.〕〔Khatere Emadzade, et. al. A molecular phylogeny, morphology and classification of genera of Ranunculeae (Ranunculaceae). Taxon. 59: 809–828 2010〕 == Taxa == * ''B. andersonii'' (A.Gray) Jeps. (= ''Ranunculus andersonii''), Anderson's buttercup, native to the Western United States * ''B. glacialis'' subsp. ''glacialis'' (L.) Á.Löve & D.Löve (= ''Ranunculus glacialis''), the glacier buttercup, occurring in boreal and alpine areas of Europe (including Iceland, Jan Mayen and Svalbard) * ''B. glacialis'' subsp. ''alaskensis'' Jurtz., D. Murray & S. Kelso (= ''Ranunculus glacialis'' subsp. ''alaskensis''), Alaskan glacier buttercup, that is endemic in the Kigluaik Mountains of the Seward Peninsula, Alaska〔 * ''B. camissonis'' (Schltdl.) Tolm. (= ''Ranunculus glacialis'' subsp. ''camissonis''), that occurs on either side of the Bering Strait, in Siberia and in Alaska〔 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「Beckwithia (plant)」の詳細全文を読む スポンサード リンク
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