Tree (1.5)6-18 in high; bark rough, or sometimes smooth, reticulate; branches spreading; young oranchlets glabrous or nearly so, or very shortly pubescent. Leaves rhachis glabrous or subglabrous; pinnae 1-3(4) pairs, leaflets 4-8(9) pairs (15)23-50(68) x (7)11-25(41) mm., oblique, ovate to rhombic-ovate or elhptic-oblong, usually rounded or slightly emarginate at the apex, glabrous, papery to subconaceous, venose, very glaucous and often pale-grey beneath. Flowers greenish-yellow, ochre when over, with whitish filaments, sessile or up to 2 mm. pedicellate, bracteoles already fallen by flowering time, minute, up to 1.7 mm. long. Calyx (3)3.5-5.5 mm. long, rather densely puberulous or minutely pubescent outside, not slit umlaterally. Corolla (5)5.5-11 mm. long, densely minutely appressed-pubescent outside. Staminal tube not or scarcely exserted beyond the corolla, filaments c. 1.5-3 cm. long. Pod dehiscent, 12-23 x 2.7-4.6 cm., oblong, glabrous except for some hairs near the base and margins, slightly venose, ± transversely plicate, thin, usually pale-brown. Seeds c. 7-9 mm. in diam., flattened.