An erect or ascending shrub 0.3-0.9 m tall, rather sparingly branched, with densely leafy, tail-like branches. Young branches with short, dense and villous pubescence. Leaflets linear to subfiliform, 5-20 mm long and 0.4-0.7 mm thick, subterete, incurved, rather weak, glabrous, bright or dark green, acuminate-apiculate. Inflorescences consisting of 1-3(-4) flowers, closely situated on lateral short-shoots, distributed in high numbers along the branches, but partly concealed among the foliage. Bracts visible on the pedicel slightly below its middle, small, tooth-like, 0.1-0.4 mm long. Pedicel slender, (1.5-)2.5-5 mm long, glabrous. Bracteoles tooth-like or almost indistinguishable, shorter than 0.2 mm. Calyx glabrous; the tube cylindrical, 2.2-2.8 mm long; lobes abruptly demarcated from calyx tube, peg-like, subulate or triangular, 0.1-1.1(-1.3) mm long. Petals light to bright yellow (or standard and keel sometimes partly purplish), glabrous; wing and keel claws as long as and two-thirds the length of the blade, respectively. Standard blade 4.6-5.7 x 2.8-4.1 mm, acute, directed forwards, almost parallel to the keel. Wing blades only 2.7-3.8 x 0.8-1.2 mm, with several rows of minute folds on most of the outer side. Keel blades 3.1-3.8 x (1.3-) ±1.5 mm. Pistil subglabrous, with few hairs on ovary top; ovules 2. Pod narrowly triangular-ovate, 5-6.2 x 2-2.9 mm, smooth, compressed, black when ripe.
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Like A. sanguinea but wings with longer claws, ± 2.5 mm long and smaller blades, to 3.5 x 1.2 mm.
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