Mimosa xanti A. Gray

Mimosa langlassei M. Micheli, Mem. Soc. Geneve 34:
277. 1903.
A shrul) or small tree, .3 — 1 m. high, the twigs glandular, and sparingly prickly. Stipules linear; jiinnae 1 pair; leaflets 8-10 pairs, lanceolate, 5-7 mm. long, oblique at base, 1-nerved, softly pubescent above, setose-hispid beneath; flowers capitate; bractlets linear-clavate, ciliate, 3 mm. long; calyx minute, ciliate; corolla 4-5 mm. long, its lobes puberulent; stamens 4, longexserted; ovary pilose, short-stipitate.
Type locality: At the base of Jorullo, Michoacan. Distribution: Michoacan.

Mimosa xanti A. Gray, Proc. Am. Acad. 5: 157. 1861
A .shrul), the twigs densely pilose-hispid, distantly armed with stout straight prickles 5-8 mm. long. Pinnae 1 pair; leaflets 4-9 pairs, oblong, acute, 8-15 mm. long, 3-8 mm. wide, apprcssed-pubcscent on both sides, setose beneath, the margin with appresscd bristles; peduncles slender, pilose-pubescent, 1.5—3 cm. long; flowers densely capitate, 4-parted; stamens' 4; bractlets filiform, much longer than the heads; legume oblong, 2-2.5 cm. long, about 4 mm. wide, finely pubescent, 2-4jointed, with short bristles on valves and margin.
Typi! uocauity: Near Cape San Lucas, Lower California. Distribution: Southern Lower California.

Mimosa conzattii Britton & Rose, sp. nov
A shrub, the twigs densely setose. Petioles short, densely setose and finely pubescent; pinnae 1 pair; leaflets 10-14 pairs, linear-oblong, 8-10 mm. long, about 2 mm. wide, apiculate, appressed-pubescent above, setose and pubescent beneath, the margin with appressed bristles; peduncles 1.5 cm. long, setose; flowers capitate; legume narrowly oblong, 2 cm. long, 5 mm. wide, densely long-setose on the valves and margins, finely pubescent, apiculate, 4-5-jointed.
Cerro San Antonio, Oaxaca, September, 1908, C. Conzatti 2239.
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