| 翻訳と辞書 |
| Astragalus osterhoutii ： ウィキペディア英語版 |
Astragalus osterhoutii
''Astragalus osterhoutii'' is a rare species of milkvetch known by the common name Osterhout milkvetch. It is endemic to Grand County, Colorado, where it is known from a few populations in Middle Park, a mountain basin.〔USFWS. (Final rule to determine ''Astragalus osterhoutii'' and ''Penstemon penlandii'' to be endangered species. ) ''Federal Register'' July 13, 1989.〕 There are five or six occurrences.〔(The Nature Conservancy )〕 It is a federally listed endangered species.
The plant grows on sagebrush badlands on soils originating from the Niobrara Formation and the Pierre Shale. The gray-brown shale and siltstone clay soils are high in selenium, which the plant concentrates, causing it to develop a foul odor.〔(Center for Plant Conservation )〕
This is a perennial herb producing many slender, erect, green stems up to a meter tall. The leaves are made up of several narrow linear leaflets up to 3 centimeters long. The inflorescence bears cream-colored, pealike flowers each over 2 centimeters long. The fruit is a flattened legume pod up to 4 centimeters long.
Threats to the species include flooding and reservoir creation, which have eliminated at least one occurrence.〔〔 All-terrain vehicle use and oil and gas exploration activities damage the habitat occupied by the plant.〔〔
==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 osterhoutii」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.
|
|