Annual to perennial, not stoloniferous; stems sparsely to moderately pilose, usually hollow, prostrate, not woody at base. Lvs moderately to densely pilose, sessile; leaflets obovate to oblong (basal pair usually ovate), acute, obtuse to cuneate at base, (3)-5-15-(20) mm long, without evident lateral veins. Peduncles > lvs, up to 50 mm long. Infl. 1-4-flowered. Calyx moderately to densely pilose; calyx teeth ± equal, linear-lanceolate, > tube. Corolla yellow or yellow with red markings, 6-8 mm long; keel obtusely angled nearer base than middle and attenuate. Pod straight or slightly curved, rounded, not winged, 6-13-(15) × 1.5-2 mm; seeds c. 0.75-1 mm diam.