Английская Википедия:Astragalus anxius
Шаблон:Short description Шаблон:Speciesbox
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 is critically imperiled.[1] It was formally described in 1992.[2]
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.[3]
Taxonomy
Astragalus anxius was first described in 1992, when it was separated from Astragalus tegetarioides.[2] Some sources treat it as a variety of A. tegetarioides, A. tegetarioides var. anxius.[4]
Distribution
Astragalus anxius is endemic to northern Lassen County, California, where it grows in the volcanic soil of the Modoc Plateau.[2] There are 97 observations as of 2019 reported to Calflora.org, some of which are threatened by livestock trampling.[1]
References
External links
- Jepson Manual Treatment - Astragalus anxius
- USDA Plants Profile; Astragalus anxius Шаблон:Webarchive
- Astragalus anxius - Photo gallery
- Английская Википедия
- Astragalus
- Endemic flora of California
- Flora of the Great Basin
- Modoc Plateau
- Modoc National Forest
- Natural history of Lassen County, California
- Plants described in 1992
- Critically endangered flora of California
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- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
