A robust, erect shrub resembling A. pinguis in habit, usually 0.4-0.6 m tall, with main branches up to more than 10 mm thick, sparsely branched, with densely villous branches. Leaflets sausage-shaped or conical-ovoid, 2-4 x 0.8-1.2 mm, carnose, terete or angular, green, glabrous, acute-apiculate. Inflorescences unifloral, on lateral short-shoots, distributed along the branch ends. Bract linear, ±2.5 x 0.4 mm, subglabrous, pointed. Pedicel 0.5-1 mm long, tomentose. Bracteoles linear, 2.5-3.5 x ±0.4 mm. Calyx tube campanulate and (contrary to all forms of A. pinguis) sparsely tomentose on most parts; lobes pyramidal-ovoid, 1.2-2 mm long, 1.3-1.8 mm thick, carnose, green, glabrous, acute, sometimes spreading. Petals yellow (or standard sometimes dark red), rigid, carnose, glabrous or subglabrous. Standard blade 6-7 x 5-6 mm, recurved near the middle of the back, sides firmly incurved, apex pointed; pubescent only at the base. Wing blades lanceolate, slightly upcurved, 5.3-6.5 x 2-2.3 mm, obtuse, glabrous, with major longitudinal fold and some rows of minute folds covering most of upper parts. Keel blade 4.9-6 x 2.7-3 mm, glabrous. Pistil pubescent on basal upper parts of the ovary only; ovules 2; style glabrous. Pod rhombic-lanceolate, 8.5-12 x 3.5-5 mm, glabrous except on basal parts, rather thick-walled, smooth, brown when ripe.
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Like A. pinguis but leaflets always terete, sausage-shaped, 2-5 mm long and calyx lobes ovoid, fleshy, swollen.