An erect, rigid, sparingly branched shrub 0.5-1.8 m tall with strong, spreading branches. Young branches subterete, ferruginous, glabrous or provided with sparse, long, spreading hairs. Leaves broadly ovate or elliptic to orbicular, 15-50 x 12-45 mm, stiff, hard, glabrous, with a rigid, apical, slightly recurved spine, cordate, semi-amplexicaul, with 9-15 longitudinal veins, between these reticulate venation; margins prominently veined, with up to 1(-1.5) mm long, peg-or tooth-like projections. Inflorescence a terminal, sparse or compact raceme with (4-)7-15(-25) flowers. Bract linear to subfiliform, 3-8(-10) x 0.2-1 mm, ± flat, weak, with few spreading hairs. Pedicel 2.5-4.5(-6) mm long, glabrous or subglabrous. Bracteoles 0.8-5 mm long. Calyx tube campanulate, smooth with sparse or very sparse, long, spreading hairs; lobes broadly to narrowly triangular, 1-6.5 mm long, subglabrous, tapering into a ± subulate, pointed apex. Petals light (lemon) yellow or the standard ± purplish or violet. Standard blade very broadly obovate or almost circular, 7.5-11 x 9-14.5 mm, obtuse-retuse, closely tomentose-sericeous on the back. Wing blades spathulate or oblanceolate, 7-10.5 x 3-4.5 mm, glabrous with 5-6 rows of minute folds on basal half. Keel blades 6-7.5 x 3.5-5 mm, glabrous, with nearly straight upper margin. Pistil glabrous except on the upper and lower side of apical half of the ovary; ovules 8-21. Pod linear or narrowly lanceolate, 17-37 x 4.7-6.8 mm, glabrous or slightly hairy above and below, smooth, with several seeds.
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Rigid, sparsely branched shrub to 1.8 m. Leaves 1-foliolate, ovate-orbicular, subamplexicaul, stiff, margins with peg-like teeth, 9-15-veined from base, glabrous. Flowers 4-15(-25) in sparse or compact terminal raceme with distinct peduncle, pale yellow or lemon-yellow, standard purplish or violet, wings and keel glabrous, calyx very sparsely and softly hairy, lobes triangular.
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