Erect well-branched sometimes robust herb 1–2(3) m tall; branches densely appressed pubescent. Leaves 3(4)-foliolate; leaflets mostly 3–13 × 2.5–7 cm, elliptic to obovate, appressed puberulous beneath; petiole ± as long as leaflets or shorter; stipules up to 3 mm long, filiform, deciduous, or absent. Racemes shortly pedunculate, mostly 15–30 cm long, many-flowered; bracts up to 5 mm long, linear, caducous before the flowers open; bracteoles at the base of the calyx, similar but smaller. Calyx 6–7.5 mm long, becoming basally truncate and deflexed against the pedicel, ± densely appressed pubescent; lobes narrowly triangular-acuminate, subequal to or longer than the tube. Standard elliptic, yellow, usually veined reddish-brown, glabrous outside; wings much shorter than the keel; keel 1.2–1.4(1.5) cm long, shallowly rounded, with a narrow somewhat projecting pointed beak (slightly incurved only at the tip), yellowish-green, sometimes conspicuously lined brown or purple. Pod 3.8–5 × 0.6–0.8 cm, shortly stipitate, subcylindrical, sometimes slightly curved, puberulous, usually glabrescent, 30–40-seeded. Seeds c. 3.5 mm long, oblique-cordiform, smooth to minutely papillose, brown or mottled ochre and dark grey-green.
