A prostrate or decumbent shrublet, with 0.2-0.5 m long branches. Young branches short-and white-villous. Leaflets linear, 3-5 mm long, 0.4 mm thick, terete, ± incurved, obtuse-acute, weak, densely short-sericeous (or tomentulose). Inflorescences unifloral, on lateral short-shoots, several along the branches towards the ends. Bract linear-subfiliform, 0.8-1.2 x 0.1-0.2 mm, puberulous. Pedicel ±1 mm long, pubescent. Bracteoles 0.2-0.4 mm long. Calyx campanulate, short-sericeous(-tomentulose); lobes linear-subulate, sharply demarcated from tube, 1.2-2(-2.7) mm long, weak, sericeous. Petals light yellow (but standard back ± purplish). Standard blade circular, 5.5-6 x 5.5-6 mm, with a short apical tip, puberulous to short-sericeous on most of the back, glabrous on the base of the back and on the front (except, sometimes for some apical marginal hairs). Wing blades 3.4-4 x ±2 mm. Keel blades 4.8-5.2 x 2.7-3 mm, with slightly convex upper margin. Pistil sericeous on upper half of ovary and upper side of style along nearly all its length. Pod obliquely and narrowly rhombic-ovate, ±7 x 3.5 mm, sericeous.
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Like A. calcarea but leaves shortly silky or hairy.