Fort Wingate Milkvetch

Homalobus wingatanus (S. Wats.) A. Heller, Muhlenbergia 1: 145. 1906.
Astragalus wingatanus S. Wats. Proc. Am. Acad. 18: 192. 1883. Astragalus wingalensis M. E. Jones, Proc. Calif. Acad. II. 5: 636. 1895. Homalobus wingalensis Rydb. Bull. Torrey Club 31: 563. 1904.
A perennial, with a cespitose caudex; stems 1.5-3 dm. high, strigose; stipules scarious, deltoid, acuminate, connate, 5 mm. long; leaves 3-6 dm. long; leaflets 9-13, linear-oblong or oblanceolate, 6-15 mm. long, 2-3 mm. wide, grayish-green, glabrous above, strigose beneath; racemes rather lax, 10-16-flowered, including the peduncle 10-15 cm. long; calyx strigose with mixed black and white hairs, the tube scarcely 2 mm. long, the teeth subulate, 1 mm. long; corolla white, tinged with purple, and the keel tipped with purple; banner 6 mm. long, obovate; wings and keel-petals about 5 mm. long, the latter with a rounded tip; pod oblong, acute at each end, sessile, glabrous, 10-22 mm. long, 4 mm. wide; seeds obliquely reniform, 3 mm. long, 2 mm. broad.
Type locality: Fort Wingate. New Mexico.
Distribution: New Mexico, Southern Colorado, and southeastern Utah.

Homalobus acerbus (Sheldon) Rydb. Bull. Torrey Club 32: 666. 1906.
Astragalus acerbus Sheldon. Minn. Bot. Stud. 1: 123. 1894.
Astragalus tenellus f. acerbus F. Macbr. Contr. Gray Herb. 65: 35. 1922.
A perennial, with a cespitose caudex; stems white-strigose, 3-3.5 dm. high, erect, striate below; stipules triangular-ovate, 1-2 mm. long, scarious; leaves 2.5-5 cm. long, the rachis sulcate above; leaflets 5-7, those of the upper leaves linear, the lateral ones 4-8 mm. long, the terminal one sometimes 15-20 mm. long, those of the lower leaves oval or obovate, 5-8 mm. long, 2-3 mm. wide; racemes lax, including the peduncle 1-2 dm. long; calyx sparingly strigose with black hairs, the tube 1.5 mm. long, the teeth deltoid-subulate, 1 mm. long; corolla white, tinged with greenish hue; banner 5 mm. long; wings slightly longer than the keel; keel-petals 3 mm. long, with roundish tips; pod 10-12 mm. long, oblong, short-stipitate, glabrous, 3 mm. wide; seeds black, oblong-reniform, nearly 3 mm. long, 1.5 mm. wide.
Type locality : Glenwood Springs, Colorado.
Distribution : Western Colorado.