Astragalus anisus is a species of flowering plant in the legume family known by the common name Gunnison milkvetch. It is endemic to Colorado in the United States, where it is limited to the Gunnison Basin of Gunnison and Saguache Counties. Much of the territory has been used as rangeland, at times with heavy grazing of livestock. Sagebrush has been removed and the land reseeded with various non-native grasses such as Agropyron cristatum and Bromus inermis as well as clovers. The Blue Mesa Reservoir was also created when a dam was built in the basin.