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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 Astragalus tyghensis ： ウィキペディア英語版 Astragalus tyghensis ''Astragalus tyghensis'' is a species of flowering plant in the legume family known by the common name Tygh Valley milkvetch. It is endemic to Oregon in the United States, where it is known only from the Tygh Valley of Wasco County.〔(''Astragalus tyghensis''. ) Oregon Department of Agriculture.〕〔(''Astragalus tyghensis''. ) NatureServe.〕 This species is a perennial herb growing from a stout taproot and a branching caudex. The plant forms mats or clumps, with stems growing prostrate or upright and up to 55 centimeters long. Most of the plant is covered in long, silky hairs. The leaves are divided into a number of leaflets each up to 1.7 centimeters long. The inflorescence is a raceme of up to 40 flowers. Each flower has a calyx of very hairy sepals and a pale yellow corolla up to 1.2 centimeters long. The fruit is a legume pod up to 0.7 centimeters long.〔〔 The flowers are pollinated by insects, particularly bees, and the plant reproduces by seed.〔Thorpe, A.S. and T.N. Kaye. 2008. (''Astragalus tyghensis'': actual vs. predicted population sizes. 2008 Final Report. ) Prepared by Institute for Applied Ecology for Prineville District BLM. 14 pp.〕 This species grows in sagebrush, prairie, and grassland habitat, and may occur along roadsides.〔〔 This species was a candidate for federal protection by the United States Fish and Wildlife Service. It is now considered a Species of Concern. The plant's habitat has been consumed for agricultural purposes.〔 It also faces competition with noxious weeds,〔 such as ''Centaurea diffusa''.〔 ==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「Astragalus tyghensis」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.