Astragalus barrii
Barr's milkvetch | |
---|---|
![]() | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fabales |
Family: | Fabaceae |
Subfamily: | Faboideae |
Genus: | Astragalus |
Species: | A. barrii
|
Binomial name | |
Astragalus barrii Barneby
|
Astragalus barrii is a species of flowering plant in the legume family known by the common name Barr's milkvetch. It is native to the United States, where it is a "regional endemic", occurring in parts of southwestern South Dakota, northeastern Wyoming, southeastern Montana, and Nebraska.[1][2]
This mat-forming
This plant occurs on buttes and badlands in the Powder River Basin and surrounding areas. The habitat is generally mixed-grass prairie on limestone, sandstone, shale, or siltstone.[4] It grows alongside other species of Astragalus including A. gilviflorus, A. hyalinus, A. bisulcatus, A. racemosus, and A. spatulatus, and it must be in flower to be distinguished from other species with three leaflets on each leaf.[3]
This plant was first collected in 1900 in Wyoming. It was described as a species in 1956 and named for the botanist and cattle rancher Claude Arno Barr (1887–1982).[3]
References
- ^ a b c Astragalus barrii. The Nature Conservancy.
- ^ "USDA Plants Database".
- ^ a b c d Ladyman, J. A. R. Astragalus barrii Barneby (Barr’s milkvetch): A Technical Conservation Assessment. Prepared for the USDA Forest Service, Rocky Mountain Region, Species Conservation Project, March 14, 2006.
- ^ Astragalus barrii. Archived October 26, 2011, at the Wayback Machine Center for Plant Conservation.