Slender scrambling annual; stem sparsely hairy. Lvs moderately hairy; tendrils simple or branched; leaflets in 2-5 pairs, often alternate, linear to narrowly elliptic-oblong, 5-20 mm long; stipules with 1, adaxial, basal lobe, rarely entire. Infl. ± = lvs, 1-2-(4)- flowered. Peduncle much > fls. Pedicel 1-3 mm long. Calyx not gibbous at base; calyx teeth unequal; lower teeth just < tube; upper teeth much < tube. Corolla white and tinged pale blue to pale purple, 3-6 mm long; limb of standard = or > claw. Pod glabrous, brown, (2)-3-5-seeded, 10-15 mm long; seeds greenish with purple blotches turning deep reddish brown or brown; hilum ⅙-⅕ of circumference.