Coursetia caribaea var. sericea (A. Gray) Lavin

Benthamantha wrightii Rydberg, sp. nov
Cracca Edwardsii A. Gray, PI. Wright. 2: 35, in part. 1853.— A. Gray, Proc. Am. Acad. 17: 201. 1882.
A suffruticose perennial; stem 3-5 dm. high, at first sparingly pilose with spreading hairs; stipules subulate-setaceous, 4-5 mm. long; leaves 7-10 cm. long; rachis sparingly pilose; stipels subulate, 1 mm. long or less, often caducous; leaflets 7-13. elliptic, 1-3.5 cm. long, sparingly appressed-silky on both sides, obtuse at both ends, often purplish along the veins beneath; racemes 1-1.5 dm. long, often exceeding the leaves; bracts tinged with purple; calyxtube 2 mm. long, the lobes lance-subulate, acuminate, the upper two 2 mm. long, the lowest one 3 mm. long; corolla 7 mm. long, the banner purple, the wings and keel yellowish; pod 6 mm. long, 3 mm. wide, puberulent, nearly straight.
Type collected between San Pedro and the Sonoita, Sonora, C. Wright 963. in part (herb. Columbia Univ.).
Distribution: Sonora and Arizona.