Shrubs or trees, small, ca. 15 m tall, unarmed. Young branchlets slightly angular with ridges gray tomentose, glaucous. Leaves argenteous to greenish or golden when not extended; rachis not angulate; glands at rachis of pinna insertion; pinnae 10-20(-25); leaflets 26-46 pairs, dense, distance between leaflets not more than width of 1 leaflet, linear, 2.6-3.5 × 0.4-0.5 mm, abaxially or both surfaces gray-white pubescent. Heads 6-7 mm in diam., arranged in axillary racemes or panicles; peduncles ca. 3 mm. Flowers yellowish or orange-yellow. Legume red-brown or black, glaucous, oblong, flat, 3-8 cm × 7-12 mm, glabrous. Seeds elliptic, flat. Fl. Apr, fr. Jul-Aug. 2n = 26.
Shrub or small tree 2.5-10 m. high, rarely more; young branchlets usually densely short-pubescent, rarely subglabrous, and also ± grey-pruinose; pubescence grey, or yellowish at first then grey.
Leaves: petiole (0.5)1-2 cm. long, eglandular; rhachis 2.5-9.5 cm. long, with a raised gland above at the junction of each pair of pinnae, but without other glands in between as in A. mearnsii; pinnae (5)12-26 pairs; leaflets in 17-50 pairs, 2.5-5.5 x 0.4-0.7 mm., linear-oblong.
Flowers bright-yellow, in heads 4-7 mm. in diam. on peduncles up to 6 mm. long, panicled or racemose.
Pods dehiscent along one margin, 3-8 x 0.7-1.3 cm., not or only slightly moniliform.
Seeds brown to blackish-brown, 5-6 x 3-3.5 mm.; caruncle conspicuous; areole 3.5-4 x 0.75-1.5 mm.
Bis 15 m hoher, immergrüner Baum oder Strauch, ohne Dornen. Junge Triebe weissfilzig. Blätter 2fach gefiedert, mit 8–25 Fiederpaaren. Fiederchen 2–5 mm lang. Blüten gelb, stark duftend. Die 4–5 Kronblätter zu einer kurzen Röhre verwachsen, von den zahlrei
Shrub or tree, up to 15 m high; with a rounded crown; unarmed. Leaves with leaf rachis with gland at junction of all or most pairs of pinnae but not between pinnae pairs; leaflets 1.55.5 mm long. Flowers: inflorescence capitate; corolla bright yellow; Jul.-May. Pods not or slightly moniliform, dehiscing longitudinally along one margin only.
Unarmed shrub or tree, up to 15 m high. Leaf rhachis with gland at junction of all or most pairs of pinnae but not between pinnae pairs; leaflets 1.5-5.5 mm long. Pods not or slightly moniliform. Flowers bright yellow.
Unarmed shrub or tree up to 15 m high with a conical or rounded crown; bark grey-brown to blackish, smooth or rough on very old trunks; young branchlets usually densely short-pubescent, rarely subglabrous, ± grey-pruinose, indumentum grey or sometimes yellowish at first and then grey. Leaves bipinnate, often glaucous; petiole 0.5-2 cm long, eglandular; rhachis 2.5-10 cm long, with a raised gland on its upper surface at the junction of each pair of pinnae, but without other glands in between the pinnae pairs as in A. mearnsii; pinnae (5)10-26 pairs; leaflets in 17-50 pairs, 2-5.5 x 0.4-0.7 mm, linear-oblong, sparingly to ± densely pubescent or glabrous beneath, margins with or without cilia. Inflorescences capitate, panicled or racemose. Flowers bright yellow; peduncles densely pubescent, up to 6 mm long. Calyx and corolla glabrous except for apices of the lobes. Pods 3-8 x 0.7-1.3 cm, not or only slightly moniliform, dehiscing longitudinally along one margin only, straight or slightly curved. Seeds brown to blackish-brown, 5-6 x 3-3.5 mm, elliptic, compressed, smooth; caruncle conspicuous; areole 3.5-1 x 0.75-1.5 mm.
Unarmed, evergreen tree, 5-15 m, branches with velvety-hairy growth tips, initially yellow, turning greyish or white. Leaves bipinnate, silvery grey, finely hairy. Flowers in globose heads, pale to bright yellow. Pods greyish or purplish brown, slightly constricted between seeds.