Spinous scrambling shrub to c. 15 m tall; twigs moderately to densely puberulent, finely ribbed, rounded. Lvs 2-paripinnate; pinnae in (3)-5-10 pairs; leaflets with fine, usually appressed hairs, oblong, obtuse, entire, shortly petiolulate, 8-20 mm long, in 6-12 pairs; stipules ovate-lanceolate, deciduous; spines broad-based, recurved, present on stem and lf-rachis. Infl. axillary or terminal, racemose, many-flowered, > lvs; bracts and bracteoles deciduous. Calyx teeth unequal, rounded. Corolla pale yellow, c. 15 mm long. Pod broad, oblong, tardily dehiscent, few-seeded, 7-10 × 2-3 cm; seeds smooth, mottled brown, 8-10 mm long.