Small tree with flat crown, the branchlets sparingly appressed-pubescent or puberulent when young, becoming glabrous. Leaves moderate, bipinnate, the pinnae mostly 7-11 pairs opposite on the rachis, the leaflets several or many (20-65 pairs) ; petiole short, normally less than 1 cm. long, terete, puberulent, eglandular; rachis up to 9 cm. long, similar to the petiole; pinnular rachis 2-5 cm. long; leaf-lets small, linear or linear-oblong, 3-5 mm. long and less than 1 mm. wide, acute to obtuse apically, inequilaterally rounded basally, usually minutely ciliolate but otherwise glabrous, the costa conspicuous and somewhat excentric, more or less lustrous on the upper surface; stipules linear-lanceolate, about 3 mm. long, per-sistent.. Inflorescence of axillary, pedunculate heads; peduncles 1.5-4.5 cm. long, puberulent; heads few-to several-flowered, dense, spherical, the bracts small and subpersistent. Flowers red; calyx campanulate, little more than 1 mm. long, glabrous or puberulent, the teeth short and broad; corolla funnelform, 5-6 mm. long, pubescent; stamens about 3 cm. long, the staminal tube barely exserted. Legume linear-spatulate, 5-8 cm. long and scarcely 1 cm. wide, pubescent, the margins thick.
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