Multi-stemmed shrub 1–2 m tall with angular finely pubescent to glabrescent stems. Leaflets 3, 3–10 × 2–6 cm, oblong to elliptic-oblong or slightly ovate, the laterals only slightly asymmetric, rounded to slightly emarginate at the apex, rounded at the base, slightly discolorous, minutely appressed puberulous above, paler and more densely grey pubescent beneath; petiole 3–6 cm long; rhachis 1.2–2.5 cm long; petiolules 4–9 mm long; stipules 2–3 mm long, triangular, soon falling; stipels small, linear, deciduous. Inflorescences terminal and axillary, much shorter than the subtending leaves, 5–7 cm long, often branched, 2–7 cm long; greyish or fulvous silky pubescent; peduncles less than 1 cm long; pedicels 4–7 mm long; bracts 5–8 × 2–6 mm, obovate, glabrous inside, mostly soon falling; bracteoles 5–6 × 2 mm, linear-lanceolate, deciduous. Calyx tube 3.5–5 mm long; lobes 5–7 × 2.5 mm, lanceolate, the lowest the longest, the upper pair joined for half to two-thirds their length. Standard crimson turning to deep mauve, almost black or carmine-red (fide Wilczek), sometimes white, 13–15 × 13–16 mm, rounded obovate, auriculate and with 2 calli. Pods up to 8 × 1.8 cm, falcate-oblanceolate, pubescent and with scattered glands and glandular hairs. Seeds not seen.