Velvetpod Mimosa

Mimosa dysocarpa Benth.; A. Gray, PI. Wright. 1: 62. 1852
A shrub, the twigs angled, brownish villous, very prickly, the prickles stout, light-colored. Pinnae 6-12 pairs; leaflets 7-16 pairs, oblong-linear, acute, pubescent on both sides; spikes 1-2 cm. long; calyx and corolla pubescent; legume 2.5-5 cm. long, about 6 mm. wide, tomentose, more or less constricted between the seeds, the margin prickly; stamens twice as many as the corolla-lobes.
Type locality: Pass of the Limpia. Texas.
Distribution: Southern Texas and New Mexico to Arizona and Durango.

Mimosa wrightii A. Gray, PI. Wright. 2: 52. 1853
A shrulj, the twigs angled, pubescent and prickly, the prickles brown. Pinnae 7-10 pairs; leaflets 10-15 pairs, linear or narrowly oblong, 3-4 mm. long, acute, glabrate above, appressedpubescent beneath; spikes 3-4 cm. long; calyx and corolla pubescent; legume 3-5 cm. long, 5-6 mm. wide, densely tomentose, unarmed; stamens twice as many as the corolla-lobes.
Type locality: Sonoita, Sonera.
Distribution: Southern Arizona, Sonora, and Chihuahua.