Astragalus yumenensis is a species of flowering plant in the family Fabaceae. It is a perennial with purplish-red flowers. The species is native to China and Mongolia, and was first validly described in 2003.
Taxonomy The species name was first published by Shan Bao Ho in 1994, though that description was invalid, as two type specimens were cited. A valid description was published by Dietrich Podlech and Lang Ran Xu in 2003.
Distribution Astragalus yumenensis is native to the temperate biome of China (north-central, Inner Mongolia, Gansu, and Qinghai) and Mongolia.
It grows on arid slopes and alluvial fans, at elevations of .
Description Astragalus yumenensis is a perennial. It grows high. The plant has several stems, which are long, and covered in white hairs.
The leaves are long, and have stems. The plant has two or three pairs of leaflets. The leaflets are long, and wide.
The inflorescence is a long raceme, which grows on a stem. The calyx is a narrow tube measuring long. The calyx has long teeth, and is covered with black and white hairs. The petals are purplish red. The standard is narrowly obovate, long, and wide. The wings are long. The keel is long. The plant flowers in May and June.
The fruit is a straight to slightly curved legume, which is long, and around wide. The legume has two locules, and lacks a stem. The fruit ripens from June to August. Each valve has three or four seeds.
Nomenclature In Chinese, the species is known as ().
References