Astragalus agrestis

Astragalus agrestis is a species of milkvetch known by the common names purple milkvetch, purple loco, and field milkvetch. It is native to much of western and northern North America from most of Canada to the southwestern United States, as well as eastern Asia. It grows in vernally moist areas such as meadows,[1] and is often found in sagebrush.

Astragalus agrestis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Astragalus
Species:
A. agrestis
Binomial name
Astragalus agrestis
Dougl. ex G.Don, 1832
Synonyms

Astragalus dasyglottis
Astragalus goniatus
Astragalus hypoglottis

Description

This is a perennial herb growing a slender but sturdy stem from an underground caudex. It leans or grows upright to a maximum height near 30 centimeters. The stem is often roughly hairy. Alternately arranged leaves are up to 10 centimeters long and made up of several pairs of leaflets up to 2 centimeters long each. They are oval to lance-shaped and may have notched tips. The inflorescence is an oval-shaped cluster of up to 15 purple or pink-tinted to nearly white pealike flowers. Each flower is up to 2 centimeters long.[2] Flowers bloom May to August.[1]

The fruit is an oval-shaped legume pod up to a centimeter long. It is dark colored with white hairs and dries to a papery texture.

Cultivation

When grown in garden settings the network of roots spreads enthusiastically and must be confined if the landscaper does not want a large patch of purple milkvetch.[3]

References

  1. "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org.
  2. "USDA Plants Database".
  3. Barr, Claude A. (1983). Jewels of the plains : wild flowers of the Great Plains grasslands and hills. Minneapolis: University of Minnesota Press. p. 37. ISBN 0-8166-1127-0.


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