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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lophophora ： ウィキペディア英語版 Lophophora ''Lophophora'' is a genus of spineless, button-like cacti native to the southwestern United States (Texas and New Mexico) through Northeast Mexico and South to Querétaro in central Mexico. The species are extremely slow growing, sometimes taking up to thirty years to reach flowering age (at the size of about a golf ball, excluding the root) in the wild. Cultivated specimens grow considerably faster, usually taking between three to ten years to reach from seedling to mature flowering adult. The slow rate of reproduction and over-harvesting by collectors render the species under threat in the wild. == Taxonomy == ''Lophophora'' means "crest-bearing", referring to the tufts of trichomes that adorn each tubercle. The name is derived from the two Ancient Greek words ''λοφος'' (''lophos'', the crest of a hill or helmet) and ''φορεω'' (''phoreo'', to carry). ''Lophophora'' has been reported to comprise everything from one species, ''L. williamsii'' with varieties, to the four species ''L. diffusa'', ''L. fricii'', ''L. viridescens'', and ''L. williamsii''. Most modern authorities consider ''Lophophora'' to be a genus of two species, ''L. diffusa'' and ''L. williamsii''. Recent DNA sequencing studies (Butterworth et al. 2002) have shown that ''L. diffusa'' and ''L. williamsii'' indeed are distinct species. DNA evidence from the alleged species ''L. fricii'' and ''L. viridescens'' would allow for more accurate classification.〔C. A. Butterworth & J. H. Cota-Sanchez, & R. S. Wallace (2002), ”Molecular systematics of Tribe Cacteae (Cactaceae: Cactoideae): A phylogeny based on rpl16 intron sequence variation”, ''Systematic Botany'' ''27'' (2), 257-270.〕 Below is given a key for the currently accepted species along with the "species" and varieties that must be considered synonymous. Detailed arguments for this classification can be found in ''Peyote: The Divine Cactus'' (Anderson 1996, pp. 210–219). 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「Lophophora」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.