Tree or large shrub, wholly glabrous or extremities puberulous; branches brown or reddish-brown to grey. Infra-stipular prickles geminate or ternate, short, straight or slightly recurved, frequently wanting. Leaf-rachis from 1 1/2–3 1/2 in., minutely pubescent or glabrous, usually with a small gland near the base; pinnæ 3–6-jugate, leaflets in 12–20 pairs, oblong or oval-oblong, obtuse, 3–5 lines long. Inflorescence and flowers as in A. Verek, the spikes usually shorter than the leaves. Ovary glabrous. Legume linear, straight, flat, apiculate or acuminate, narrowed at base, 3–4 1/2 in. long, 1/2– 2/3 in. broad, valves thinly coriaceous, glabrous, finely transversely reticulate, slightly convex over each seed. “Seeds oval, longer than broad” (Schweinfurth).