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Leaves 2–7-foliolate, the lower pairs opposite or alternate; leaflets 12–45 × 1–5.5(7) mm, linear to narrowly elliptic, narrowed at both ends, mucronulate, sparsely pilose on both surfaces; petiole obsolete or up to 8 mm long; rhachis terminating in a simple or branched tendril or sometimes a bristle; petiolules c. 1 mm long; stipules 5–13 mm long, semi-sagittate, sometimes with 1–2 additional teeth.
A straggling herb. It can be 1 m tall. The stems are angular. The leaves have 2-7 leaflets. These are 12-45 mm long by 1-6 mm wide. There are 2-8 flowers in a group. This is 1-3 cm long. The pods are 2-3 cm long by 4-7 mm wide. They are oblong and flat. There are 5-11 seeds. The seeds are greenish brown with black marks.
Corolla blue, mauve or violet, 9–10 mm long; standard c. 10 × 6.5 mm, obovate, emarginate, sometimes greenish; wings as long as the standard or a little shorter; keel c. 6.5 mm long, obtuse.
Seeds greenish-brown and densely mottled black to black, usually (3)6–10, c. 3 × 2.5 × 2 mm, irregularly subglobose, compressed; aril yellowish, produced into a tail.
Calyx laxly pilose to subglabrous; tube 2–2.5 mm long; lobes subequal, 1–5 mm long, narrowly triangular-subulate to linear.
Racemes 1–5-flowered; peduncle 20–35 mm long; pedicels 2–4 mm long, pilose, more densely so towards the apex.
Stems angular, densely pilose when young, becoming sparsely pilose to subglabrous.
Delicate straggling climbing or suberect perennial herb up to 1 m tall.
Style c. 1.5 mm long, densely pubescent all round towards the apex.
Pod 24–30 × 4–7.5 mm, oblong, flat, glabrous.
