Claim: The Astragalus ampullarioides is an endangered species of perennial herb mainly growing in desert scrub and woodlands on the Chinle Formation (a part of the Colorado Plateau Province).
Evidence: It is a federally listed endangered species. This is a perennial herb growing erect to a maximum height near half a meter. The species occurs in desert scrub and woodlands on the Chinle Formation. The Chinle Formation is part of the Colorado Plateau, Basin and Range, and the southern section of the Interior Plains. The Colorado Plateau, also known as the Colorado Plateau Province, is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States.