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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 Brachiaria ： ウィキペディア英語版 Brachiaria ''Brachiaria'', or signalgrass, is a genus of plants in the grass family native to tropical and subtropical regions of Asia, Africa, Australia, southern Europe, the Americas, and various islands.〔(Flora of China Vol. 22 Page 520 臂形草属 bi xing cao shu ''Brachiaria'' (Trinius) Grisebach, Ledebour, Fl. Ross. 4: 469. 1853. ) Flora of China.〕 There are over 100 species.〔 Some species are cultivated as forage. Some species of ''Brachiaria'' were probably first introduced unintentionally to the Americas in the colonial period, from slave ships. ''B. decumbens'' was introduced to Brazil in 1952 and ''B. ruziziensis'' in the 1960s. ''Brachiaria'' is the most widely used tropical grass in Central and South America, with about 40 million hectares planted in Brazil alone. ==Biology== This genus was described in 1853. It is similar to ''Panicum'', and some authors believe ''Panicum'' is ancestral to it.〔 It has also been confused with ''Urochloa'', and sometimes combined with it.〔 A recent phylogenetic analysis concluded that ''Brachiaria'' and ''Urochloa'' are a monophyletic group, along with ''Eriochloa'' and ''Melinis'', and that further molecular and morphological work is needed to establish clear relationships.〔 In the meantime, ''Brachiaria'' and ''Urochloa'' plants are usually not difficult to distinguish from one another.〔 ''Brachiaria'' are annual or perennial grasses, most lacking rhizomes. The inflorescence is a branching panicle, and the plant reaches about a meter in height.〔Watson, L. and M. J. Dallwitz. (2008). (''Brachiaria''. ) The Grass Genera of the World. Retrieved 7 November 2011.〕 The plants are bisexual〔 and the flowers are fleshy, with 3 anthers.〔Clayton, W. D., et al. (2002 onwards). (''Brachiaria''. ) GrassBase - The Online World Grass Flora.〕 Some species have a prominent vein in the center of the leaf.〔 ''Brachiaria'' are C4 species and can tolerate drier conditions and more light exposure than some other plants.〔 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「Brachiaria」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.