Indigofera sphaerocarpa A. Gray

Indigofera sphaerocarpa A Gray, PI. Wright. 2:
37. 1853.
A shrub, 6-12 dm. high; branches angled, more or less ferruginous-dotted or streaked; stipules subulate, 1-2 mm. long; leaves 5-10 cm. long; rachis and petiole ferruginous-strigose; leaflets 13-17, oblong, rounded and mucronate at the apex, acute at the base, 1-2 cm. long, 3-7 mm. wide, glabrous above, strigose beneath; racemes equaling or longer than the leaves; calyx 1.5 mm. long, ferruginous-strigose; corolla 6-7 mm. long, ferruginous-strigose without; pod rounded-ovoid or subglobose, 3-3.5 mm. long, 2.5 mm. thick, 1-seeded; seed globose, 2 mm. thick.
Type locality: Santa Cruz, Sonora.
Distribution: Arizona, Sonora, and Chihuahua.