Erect to spreading, short-lived perennial herb or subshrub, 0.1–0.5 (–0.9) m high; young stems ridged, grey to green or yellowish, strigose with moderately dense to dense, appressed, equally biramous hairs. Leaves (3–) 5 (–7)-foliolate; stipules narrow-triangular to subulate, 2–6 mm long; petiole 4–15 mm long; rachis furrowed; stipellae absent, or inconspicuous, 0.2–1 mm long; multicellular hairs between leaflet pairs inconspicuous, club-shaped to pointed-linear; leaflets ovate to elliptic or narrow-elliptic, (5–) 10–35 (–40) mm long, (4–) 6–15 (–17) mm wide, upper and lower surfaces grey to green, hairs sparse to moderately dense, appressed, the apex acute, or obtuse and mucronate. Inflorescences (30–) 60–150 (–240) mm long, longer than leaves; peduncle 4–15 (–20) mm long; bracts narrow-triangular, 1–2 mm long; pedicel 0.5–1.5 mm long; flowers pink to purple. Calyx (1.3–) 2–4 (–5.5) mm long; lobes longer than the length of the tube, clothed with sparse to moderately dense appressed hairs. Standard obovate to elliptic, (5.5–) 6.5–8 (–9.0) mm long, (3.5–) 4.5–6 (–8.0) mm wide. Wings narrowly obovate to spathulate, (5.0–) 6–8 (–9.5) mm long, (1.8–) 2.5–3.5 mm wide. Keel 5–7.5 mm long, 1.5–2.5 mm deep, apex acute and beaked; lateral pockets 0.5–1.2 mm long. Staminal tube 3.5–4 mm long, colourless. Ovary sparsely to moderately hairy. Pods spreading to descending, 4-angled, (10–) 30–50 mm long, 2.5–3 mm wide, brown, strigose; apex pointed to shortly beaked; endocarp not spotted; seeds 8–10 (–14) per fruit.
Recorded almost exclusively from heavy loam soils, cracking clays and black soil plains, particularly in grasslands.
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