An erect, sparingly branched shrub, often rather rod-like up to ±1 m tall. Young branches minutely puberulous, glabrescent. Leaves trifoliolate; long-shoot leaves on rather prominent leaf base tubercles which may be up to ±1 mm long (and nearly spur-like). Axillary short-shoots, with or without a flower, soon developed. Leaflets (of long-shoot leaves) sub-equal, oblong or oblanceolate, 2-6 x 1-2 mm, rounded-obtuse, pale green, puberulous, glabrescent (not silvery sericeous). Inflorescences unifloral (or bifloral), on lateral short-shoots, distributed along the branches, but usually fewer than in A. caledonensis. Bract broadly oblanceolate, ±2.5 x 1 mm, obtuse, puberulous. Pedicel shorter than 1 mm. Bracteoles similar to the bract in shape and size. Calyx campanulate, silky puberulous-sericeous; lobes ovate-triangular, 2.5-3 mm long, puberulous or subglabrous, greenish. Petals light yellow, short-sericeous on most of the back or outer sides; claws ± half as long as blades or less. Standard blade ovate, 7-8 x 7-8 mm. Wing blades oblong-elliptic, ±8 x 4 mm, with a main longitudinal fold and 1-2 rows of minor folds on basal half. Keel blades triangular-lunate, ±8 x 4 mm, contrary to other species of the group without distinct basal puckering. Pistil sericeous on the ovary and style base; ovules 2. Pod broadly lanceolate, ±10 mm long, silky sericeous.
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Erect, often rod-like shrublet to 1 m. Leaves 3-foliolate, leaflets oblong-oblanceolate, shortly hairy or subglabrous, on prominent, nearly spur-like tubercles. Flowers single on short shoots, scattered, pale yellow, wings and keel silky, calyx shortly hairy, lobes ovate-triangular.