An erect shrub or shrublet 0.2-0.7 m tall, branched at the base; branches non-thorny. Young branches short-tomentose. Leaflets linear, 3-7 mm long, subterete to slightly angular, straight or slightly incurved, subacute, bright green. Inflorescences unifloral, on lateral short-shoots, distributed 2 to numerous along the branches below leafy branch ends. Flowers rather large and broad, ± compressed, almost glabrous. Bract linear-lanceolate, 5-9 x 1.5-2.5 mm, glabrous. Pedicel 1-2 mm long, short-tomentose. Bracteoles similar to the bract but longer and narrower, 6-10 x 1-2 mm. Calyx broadly campanulate, carnose, compressed, glabrous, dorsally double-ridged; lobes cordate-triangular, basally rounded and often slightly overlapping, tapering, acuminate; upper lobes 5-9 x 5-7 mm; lower lobes narrower. Petals bright lemon-or sulphur-coloured, carnose, wide. Standard orbicular, 11-16 x 14-18 mm, retuse (but often with a 'tip'), glabrous except a few hairs along the midrib of the back. Wing blades 9-13 x 6-9 mm, with 5-7 rows of small folds on the basal third, each row with several folds. Keel blades subrostrate, 8-11.5 x 5-7 mm, glabrous, rigid, apically upcurved and nearly pointed, with rather indistinct basal pouch. Pistil glabrous; ovules 2; style slender. Pod 10-14 x 4.5-5.8 mm, basally tapering, rugose.
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Erect shrublet, 20-70 cm. Leaves 3-foliolate, leaflets subterete or slightly angular, straight or slightly incurved, glabrous. Flowers single on short shoots, scattered along branches, bright lemon-or sulphur-yellow, wings glabrous, keel with tip nearly pointed, glabrous, calyx compressed, glabrous, fleshy, lobes large and broad below, cordate-triangular, basally rounded and often slightly overlapping, Pods basally pointed.