Scrambling perennial; stem moderately to densely clothed in mostly appressed hairs. Lvs densely clothed in appressed hairs above and below; tendrils branched at least in upper lvs; leaflets in c. 8-10 pairs, sometimes alternate, linear to ovate-oblong, 5-25 mm long; stipules entire or with 1, narrow, adaxial, basal lobe. Infl. > lvs, 10-45-flowered. Peduncle much > fls. Pedicel 1-2 mm long. Calyx slightly gibbous at base, moderately to densely hairy; calyx teeth very unequal; lower teeth ± = tube; upper teeth much < tube. Corolla blue to bluish purple, c. 8-12 mm long; limb of standard ± = claw. Pod glabrous, brown, 2-6-seeded, 16-26 mm long; seeds dark brown or mottled, 2-3 mm diam.; hilum 1/4-⅓ of circumference.