A decumbent to ascending or erect, densely or sparingly branched, low shrub, up to 0.3 m tall. Branches usually straight, spreading, ultimately almost thorny. Young branches short-pubescent, usually pale yellowish. Leaflets linear or subulate, (1-)2-5(-7) mm long, subterete or slightly flat or angular, sometimes with a longitudinal adaxial groove, straight or apically ± recurved, acute-mucronulate or acuminate, dull or pale green, glabrous or sparsely to densely grey-pubescent. Inflorescences unifloral or, more rarely, bifloral, on the tips of short branchlets, or unifloral and on lateral short-shoots. Flowers rather small, inconspicuous. Bract (triangular-) linear or subulate, 0.4-4 x 0.15-0.4 mm, subglabrous or ± pubescent, pointed. Pedicel 0.5-1.7 mm long, pubescent. Bracteoles 0.3-3 mm long. Calyx tube with sparse to rather close tomentose or sericeous pubescence; lobes linear or subulate, 0.5-1.7 mm long, pubescent. Bracteoles 0.3-3 mm long. Calyx tube with sparse to rather close tomentose or sericeous pubescence; lobes linear or subulate, 1.2-3.5 mm long, subglabrous or with sparse, spreading hairs, acute-acuminate, straight or slightly incurved. Petals light lemon-coloured or standard partly with violet tinge. Standard blade broadly obovate or circular, 4.6-7.5 x 4.5-7(-7.5) mm, obtuse or retuse (rarely with a very short 'tip'), with ± distinct basal lobes; back short-sericeous or short-tomentose on most parts; front glabrous. Wing blades narrowly ovate or elliptic, 3.5-5.5 x 1.5-2.3(-3) mm, glabrous. Keel blades 4.2-7 x 2-3.5 mm, glabrous, with ± straight or slightly convex upper margin. Pistil stipitate; pubescent at least on upper parts of ovary and style base; ovules 2. Pod broadly triangular-lanceolate, sericeous to densely white-villous on most parts.
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Like A. wittebergensis but branches becoming thorny and flowers mainly light yellow.