Vachellia exuvialis (I.Verd.) Kyal. & Boatwr.

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 subglabrous. 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 subglabrous, 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 2.5-3 mm.