Mimosa rosei Robinson

Mimosa rosei B. L. Robinson, Proc. Am. Acad. 33: 317. 1898
An unarmed shrub, glabrous throughout, the twigs striate. Pinnae 3 or 4 pairs; leaflets 1 pair, obovate, subchartaceous, 15—22 mm. long, obtuse, 3or 4veined at base; peduncles short; spikes axillary, 6 cm. long ; legume linear-oblong, 7 cm. long, 5 mm. wide, S-jointed, longstipitate, acuminate; stamens twice as many as the corolla-lobes.
Type locality: Near Bolafios, Jalisco. Distribution: Known only from the type locality.

Mimosa paucifoliolata M. Micheli, Mem. Soc. Geneve 34: 278. 1903.
Mimosa laxiflora zygophylhides B. L. Robinson. Proc. ,^m. Acad. 33: 317. 1898.
A small tree or shrub, 2-7 mm. high, the twigs at first puberulent, but soon glabrate, with or without prickles. Leaves small; pinnae 2-5 pairs; leaflets 1 pair, orbicular, 6-8 mm. broad, strongly veined beneath; flowers 5-parted, glabrous, in slender racemes 2-6 cm. long; stamens 10; legume linear, 3-4 cm. long, about 4 mm. wide, glabrous, rounded at ape., cuneate at base, 5-8-jointed.
Type locality: Las Munitas. Guerrero. Distribution: Colima to Guerrero.