Climbing or scrambling subshrub, 2–10 m. long.. Stems becoming woody, at first pubescent, later glabrescent.. Leaves often fasciculate on abbreviated branchlets, often appearing after flowering and fruiting; leaflets somewhat glaucous, ovate, ovate-oblong, elliptic or rhomboid, the laterals somewhat oblique, 0·9–5·5 cm. long, 1–5 cm. wide, rounded or emarginate at the apex but sometimes minutely apiculate, cuneate, truncate or rounded at the base, almost glabrous; petiole 0·8–7 cm. long; rhachis 0·3–1·2 cm. long; petiolules 1·5–2 mm. long; stipules ovate-lanceolate, 2–3 mm. long, ribbed.. Inflorescences with rhachis 4–10 cm. long; peduncle 1–2 cm. long; pedicels 4 mm. long; bracts 1·5 mm. long, ribbed; paired bracteoles deciduous, ±1 mm. long.. Flowers scented.. Calyx sparsely pubescent or glabrescent; tube ±4 mm. long; lobes rounded, 2–3 mm. long, usually hairy along the margins, particularly of the upper lip.. Standard greenish to violet outside, greenish-cream to mauve inside, the auricles and claw white, broadly elliptic, 1·7–2·5(–3) cm. long, 1·6–2·4 cm. wide, emarginate, glabrous save for the bearded auricles; wings mauve; keel greenish-cream to mauve.. Pods oblong-falcate, 3–4·2 cm. long, 1–1·7 cm. wide, glabrous.. Seeds brown, often mottled, longest dimension 7–10·5 mm., shorter dimension 6–8 mm., 1·5–2·5 mm. thick.. Fig. 99, p. 665.
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