Twining or trailing perennial herb 1·8–6 m. long.. Stems densely covered with spreading ferruginous hairs.. Leaflets 3, ovate-lanceolate to lanceolate, 2·8–10 cm. long, 0·75–4·3 cm. wide, acuminate and mucronulate, cuneate to truncate at the base, sometimes slightly lobed or subhastate, hairy on both surfaces; petiole 1·8–7·5 cm. long; rhachis 0·5–1·6 cm. long; petiolules 2–3 mm. long; stipules ovate to linear-lanceolate, 3–8 mm. long, slightly bilobed at the base.. Inflorescences several-flowered; rhachis 2–3 cm. long; peduncles relatively long, 6–27 cm. long; pedicels 2–7 mm. long; bracteoles ultimately deciduous, linear-lanceolate, 2·5–4 mm. long, 1-nerved.. Calyx sparsely to densely hairy; tube 2·5–5 mm. long; lateral lobes deltoid, 2·5–5 mm. long; lowest lobe narrower, linear-lanceolate, 5–7 mm. long; upper pair joined to form an acute lip.. Standard yellow, sometimes tinged brown outside, oblate, 1·5–2·2 cm. long, 1·8–2·8 cm. wide, glabrous; wings yellow; keel greenish-yellow, sometimes brownish at the obtuse tip.. Pods linear, compressed, 3–5·5 cm. long, 4–5·5 mm. wide, densely covered with spreading ferruginous hairs, ± 11-seeded.. Seeds pinkish-brown or red, often mottled with black, oblong-ellipsoid, compressed, longest dimension 3·3–4·2 mm., shorter dimension 3–3·5 mm., ± 2 mm. thick; aril white, eccentric, fork-shaped with a short broad middle prong or sometimes reduced.
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