翻訳と辞書 |
Astragalus anxius : ウィキペディア英語版 | Astragalus anxius
''Astragalus anxius'' is a rare species of milkvetch known by the common names troubled milkvetch and Ash Valley milkvetch. It is endemic to northern Lassen County, California, where it grows in the volcanic soil of the Modoc Plateau. It was formally described in 1992.〔Meinke, R. J. and T. N. Kaye. (1992). Taxonomic assessment of ''Astragalus tegetarioides'' (Fabaceae) and a new related species from northern California. ''Madroño'' 39:3 193-204.〕 There are only 6 known occurrences, some of which are threatened by livestock trampling.〔(The Nature Conservancy )〕 ==Description== ''Astragalus anxius'' is a perennial herb forming a matted patch of slender, delicate stems no longer than 20 centimeters. It is coated thinly in wavy hairs. The leaves are a few centimeters long and made up of several leaflets. The inflorescence contains 7 to 15 pealike flowers. Each flower is bicolored, the lower petals usually white and the upper banner petals purple to purple-veined white. The fruit is a hairy, oval-shaped legume pod up to half a centimeter long which dries to a papery texture.
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 anxius」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.
|
|