Hamosa asperula

Hamosa asperula Rydb. Bull. Torrey Club 54: 335. 1927
A cespitose perennial, with a woody root and caudex; stems decumbent or spreading, 1-2 dm. long, purplish, appressed-pubescent with short stiff hairs; leaves 3-5 cm. long, spreading, the rachis pubescent, sulcate on the upper side; stipules connate, deltoid, acuminate, membranous; leaflets 13-23, linear, 6-12 mm. long, glabrous above, strigose beneath, more or less involute; peduncles 3-6 cm. long; racemes dense, 1-3 cm. long; bracts lanceolate, membranous, 2-3 mm. long; pedicels 1 mm. long; calyx black-hairy, the tube 2.5 mm. long, campanulate, the teeth subulate, 2.5 mm. long; corolla purplish, 8 mm. long; banner obovate, strongly arcuate; wings nearly as long, the blade broadly obovate; keel-petals shorter, broadly lunate, the blade nearly semiorbicular, obtuse; pod falcate, strigose, 14-16 mm. long, 2-6 mm. broad and high, tapering at the apex.
Type locality: Between Pachuca and Real del Monte, Hidalgo. Distribution: Known only from the type locality.