a tree; branches prickly, petioles unarmed; leaflets petiolulate, broadly ovate, obtusely acuminate, glabrous; racemes densely many-flowered; calyx tomentulose, obliquely labiate or splitting, afterwards enlarged, obsoletely denticulate; vexillum minutely velvetty; vexillary stamen adnate below the middle to the split staminal tube; legumes moniliform, glabrate, unarmed. A tree 30–40–60 feet high. Bark of the twigs pallid, rugose. Prickles small. Leaves clustered toward the end of the twigs, on puberulous petioles 2–4 inches long, the terminal leaflet 1–1 1/2 inch from the lateral pair. Stipellæ gland-like. Leaflets 2–2 1/2 inches long, 1 1/2–2 inches wide, rounded at side, suddenly tapering to a blunt point, thin and membranous. Peduncles thick as a goose-quill, 4–6 inches long, floriferous from the middle. Flowers scarlet, the vexillum 1 1/2–2 inches long, falcate-oblong, of thick substance. Ovary and young pods densely tomentose, the old ones naked, strongly constricted between the seeds.
