Lathyrus latifolius

Prostrate or climbing perennial herb; stems to c. 3 m long, glabrous or hairy, distinctly winged. Leaflets ovate to elliptic, 3–10 cm long, 5–40 mm wide, glabrous, apices obtuse, sometimes mucronate; tendrils usually 5 or more; petiole 2–5 cm long, winged; stipules lanceolate to ovate, semi-hastate, 1–5 cm long. Flowers 3–15 in racemes 15–25 cm long; pedicel 1–2 cm long; peduncle 5–20 cm long; bract filiform, 1–4 mm long, caducous; calyx 8–10 mm long, 5-veined, glabrous, teeth unequal, lowest tooth longest, upper ones more or less equal to tube; corolla 2–3 cm long, white to purple-pink; standard suborbicular. c. 30 mm wide; wings long-clawed; keel long-clawed, obtuse; style twisted. Pod sub-cylindric, 5–10 cm long, 6–10 mm wide, glabrous; seeds 7–15, c. 3–4 mm long, reticulate-rugose, grey-brown. Flowers Oct.–Feb.