Pagumpa Milkvetch

Hamosa ensiformis (M. E. Jones) Rydb. Bull. Torrey Club
54:21. 1927. Astragalus ensiformis M. E. Jones, Proc. Calif. Acad. II. 5: 658. 1895.
A perennial, with a scaly rootstock; stem about 1 dm. high, purplish, sparingly strigose; leaves 5-8 cm. long, ascending; stipules large, broadly ovate, 1 cm. long, scarious, veiny; leaflets 13-17, green, oval or elliptic, rounded at the apex, 1-1.5 cm. long, glabrous above, sparingly strigose-canescent beneath; peduncles 5-8 cm. long, erect; bracts lanceolate, brownish-purple, 3 mm. long; pedicels short; calyx pubescent with dark and light hairs intermixed, the tube 5 mm. long, the teeth lanceolate, 1 mm. long; corolla unknown; pod linear-oblong, falcate, 2-2.5 cm. long, 5-6 mm. wide and 3 mm. thick, strigose, elliptic in cross-section, with prominent sutures.
Type locality: Above Pagumpa, Arizona. Distribution: Known only from the type locality.