A decumbent (or procumbent) shrublet with branches up to about 2 m long, much branched with slender, often reddish, short-villous branchlets. Leaflets oviform to broadly linear, 1-2.5(-3.5) mm long, 0.4-0.7 mm thick, terete, succulent, with a 0.4-0.7 mm long apical mucro. Inflorescences unifloral on the ends of leafy branchlets. Bract lanceolate, succulent, (1.2-)1.5-2.3 x 0.3-0.7 mm. Pedicel 0.6-1.6 mm long, short-pubescent. Bracteoles 0.7-2.5 x 0.3-0.7 mm. Calyx tube with short, spreading, sparse to rather dense pubescence; lobes triangular, (0.7-)1.2-2.2(-2.6) mm long, green, subglabrous, ± carnose, tipped with spines ±0.5 mm long or more. Petals yellow or the standard partly purplish. Standard blade 5.2-6.7(-7.2) x 3.7-5(-5.3) mm, obtuse, densely sericeous on at least apical half of the back. Wing blades short, ovate-elliptic, (2.2-)2.5-3.2 x 1.4-1.9 mm, most parts covered with rows of minute folds. Keel blades strongly upcurved, 4.4-5 mm long (straight from base to apex) and 1.8-2.4 mm broad near middle, with apical upper part somewhat prolonged, squarish; basal bulge indistinct. Pistil pubescent only on upper parts of ovary and style base. Pod 7-8 x ±3 mm.
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Like A. divaricata but calyx with short, spreading hairs and wings half as long as keel.