Lonchocarpus hermannii M. Sousa

Willardia mexicana (S. Wats.) Rose, Contr. U. S. Nat Herb. 1: 98. 1891.
Coursetia mexicana S. Wats. Proc. Am. Acad. 21: 424. 1886.
A small tree, 3-10 m. high, with smooth bark; twigs minutely pubescent when young, soon glabrate; leaves 7-10 cm. long; rachis sparingly pubescent, sulcate above; leaflets 9-15, elliptic, obtuse at each end, 1.5-3 cm. long, 12-16 mm. wide, glaucous-green above, yellowishgreen beneath, finely pubescent on both sides; racemes somewhat panicled; calyx. 4 mm. long and broad, puberulent, the lobes minute; corolla lilac, about 1 cm. long; pod thin, tapering at each end, 5-6 cm. long, 10-12 mm. wide, puberulent, 8-10-seeded; seeds about 1 cm. long, smooth and shining, salmon-colored.
Type locality: Hacienda San Miguel. Chihuahua. Distribution: South-western Chihuahua, Sonora, and Sinaloa.