Vigna trilobata

Vigna trilobata, the three-lobe-leaf cowpea or jungle mat bean, is a regenerating annual herb found in India, Pakistan, Sri Lanka, Burma, Afghanistan and the Malay archipelago.

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Vigna trilobata is an annual or perennial legume. It has reddish stems, glabrous or rarely pubescent, which are prostrate and trailing (rarely weakly twining) to 50 cm (20 in). The leaves are trifoliolate, on petioles 1–11 cm (0.39–4.33 in) long, with leaflets ovate in outline that are 0.8–4.5 cm (0.31–1.77 in) long and 0.6–4 cm (0.24–1.57 in) wide. The leaves are also glabrous to sub-glabrous and usually shiny. The stipules are peltate, sometimes spurred, and are ovate, 4–15 mm (0.16–0.59 in) long. The inflorescence is a few-flowered raceme, with the peduncle being 2–22.5 cm (0.79–8.86 in) long, the pedicels 1–2.5 mm (0.039–0.098 in) long, and the calyx 2.5 mm (0.098 in) long and glabrous, with minute teeth. The corolla is yellow and 5–7 mm 5–7 cm (2.0–2.8 in) long. The pods are cylindrical, 1.5–5 cm (0.59–1.97 in) long and 2.5–3 mm (0.098–0.118 in) wide, from glabrous to sparingly pubescent with short adpressed hairs, and are black when ripe.