Caesalpinia robinsoniana (Britton & Rose) G. P. Lewis

Poincianella robinsoniana Britton & Rose, sp. nov
Caesalpinia mexicana pubescens Rob. & Greenm. Proc. Am. Acad. 29: 386. 1894.
A shrub with grayish glabrous twigs. Petioles slender, glabrous, purplish, 2-4 mm. long; pinnae 3 or 5; leaflets 2 or 3 pairs, elliptic or oval, rounded, 13-30 mm. long, pubescent on both sides, delicately reticulate-veined, pale beneath; racemes 1-1.5 dm. long, glabrous; pedicels slender, 5-8 mm. long, glabrous, jointed near the top; calyx-lobes oblong, glabrous, about 7 mm. long, one or more of them bearing marginal glands; petals obovate, about 10 mm. long, their claws sparingly glandular; stamens about as long as the petals; ovary velvety; legume obliquely oblong, 5-6 cm. long, 14-16 mm. wide, glabrate, eglandular.
Type i.oc.uitv: Zapotlan. Jalisco.
Distribution: Known only from the type locality.