Scrambling annual; stem ± glabrous. Lvs sparsely to moderately hairy; tendrils branched at least in upper lvs; leaflets in 5–10 pairs, often alternate, linear to narrowly elliptic-oblong, 5–17 mm long; stipules entire or with 1, adaxial, basal lobe. Infl. = or < lvs, 2–6-flowered. Peduncle much > fls. Pedicel 0.5–2 mm long. Calyx slender at base; calyx teeth unequal; lower teeth slightly > tube; upper teeth much < tube. Corolla mauve, 5–6 mm long; limb of standard ± = claw. Pod ± glabrous, brown, usually 2-seeded, 15–22 mm long; seeds smooth or tuberculate, dark brown with reddish brown blotches or dark reddish brown; hilum 1/10–1/7 of circumference.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Flowering: Nov.–Feb.