Many stemmed shrub or small tree with slender ascending branches to 5 m high. Bark pale to dark yellowish- or greyish-brown, often oily in appearance, peeling in long strips; young branchlets reddish-brown to purplish-black, sometimes flaking, with some scattered inconspicuous dark sessile glands, often glutinous, glabrous or sub-glabrous. Stipules spinescent, in pairs, 0,4-7,7 cm long, straight or ± deflexed, sometimes slightly enlarged and swollen, whitish, glabrous; other prickles absent. Leaves: petiole (0,3)0,8-1,5(2,4) cm long, adaxial gland usually absent; rhachis (0)0,7-2,4(4,7) cm long, glabrous or sub-glabrous, with a small sessile to shortly stipitate gland at the junction of each pinna pair, otherwise eglandular or with a few scattered inconspicuous glands; pinnae (1)2-4(6) pairs; rhachillae 0,6-2(3,3) cm long, glabrous or subglabrous; leaflets 3-6 pairs per pinna, (2,4)4-7(10) X 1,5-3(4,5) mm, linear-oblong to ovate- or obovate-oblong, margins entire, eglandular or almost so, glabrous, lateral nerves inconspicuous beneath, apex ± spinulose-mucronate. Inflor­escences capitate, on axillary peduncles, solitary or fascicled along shoots of the current or previous season. Flowers bright yellow, sessile; peduncles (1,3)2-3(3,9) cm long, glabrous or subglabrous, glandular; involucel at or above the middle of the peduncle, 2-4 mm long. Calyx glabrous or subglabrous, tube 1,2-1,8 mm long, lobes up to 0,6 mm long. Corolla glabrous, tube 1,5-2,5 mm long, lobes up to 0,7 mm long, often reflexed. Stamen-filaments free, up to 4,5 mm long; anthers with a deciduous apical gland. Ovary shortly stipitate, up to 1,8 mm long, glabrous. Pods pale to dark yellowish-or reddish-brown, 1,5-3,6(6,5) X 0,4-0,9 cm, slightly to strongly falcate, somewhat torulose, subcoriaceous, venose, longitudi­nally dehiscent, eglandular or with few scattered glands, slightly glutinous, glabrous. Seeds olive-green to olive-brown, 5-8 x 3,5-6 mm, elliptic, compressed; areole 3-5 X 2,5-3mm.