Mimosa ervendbergii A. Gray

Mimosa ervendbergii A. Gray, Proc. Am. Acad. 5: 178. 1861
A shrub, about 2 m. high, the twigs somewhat angled, densely tomentose, armed with short prickles. Petiole and rachis pubescent, with numerous short reflexed prickles; stipules filiform ;' pinnae 3-5 pairs; leaflets about 12 pairs, narrowly oblong, 7-10 mm. long, about 2 mm. wide, acute, pubescent on both sides; inflorescence a terminal raceme or panicle of small heads; peduncles slender, 2 cm. long, or shorter, pubescent; flowers 4-parted; corolla pubescent.
Type locality: Wartenberg, near Tamtoyuca, Veracruz. Distribution: Northern Veracruz.

Mimosa mexiquitensis Britton, sp. nov
Woody, the twigs, inflorescence, petioles and rachis densely tomentose-pilose. Twigs, petioles and rachis armed with short, recurved prickles; pinnae 3 or 4 pairs; leaflets 8-12 pairs, broadly oblong, 9-13 mm. long, 4—6 mm. wide, acute, pubescent on both sides, becoming glabrate above; peduncles axillary and in terminal racemes, 1-2 cm. long; flowers 4-parted, glabrous; stamens 8.
Finca Mexiquita, Chiapas, September, 1913, Purpus 6S16.

Neomimosa Donnell-Smithii Britton & Rose, sp. nov
A clambering vine, the branches angled, pubescent, and bearing numerous small reflexed prickles. Leaves large, the petiole and rachis pubescent and prickly; pinnae 5-8 pairs; leaflets 15-25 pairs, linear-oblong, 6-8 mm. long, about 1 mm. wide, pubescent on both sides; inflorescence paniculate; peduncles 1-2 cm. long, pubescent; legume oblong, 5-6 cm. long, about 1 cm. wide, puberulent when young, long-stipitate, attenuate at apex, the margins and stipe prickly. Cubilquitz, Guatemala, 1902, H. von Tuerckheim 8191.