Astragalus humillimus A. Gray

Phaca humillima (A. Gray) Rydb. Bull. Torrey Club 32:665. 1906.
Astragalus humillimus A. Gray; Brand. Bull. U. S. Geol. Snrv. Terr. 2: 235. 1876. Tragacantha humillima Kuntze, Rev. Gen. 945. 1891.
Perennial, with a woody root and cespitose tufted caudex; stems 3 cm. high or less, covered by imbricate, connate, scarious stipules; leaves 1-2 cm. long, ascending, the rachis persistent and spinescent; leaflets 7—11, oblong, canescent, 2 mm. long, deciduous; peduncles short; racemes 1-3-flowered; calyx-tube shorter than the subulate calyx-lobes; corolla pale; pod ovate, sessile, white-pubescent, 4-5 mm. long.
Type locality: Mesa Verde, near edge of Mancos Canon, southwestern Colorado. Distribution: Known only from the type locality.