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

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.

However, under moisture stress, plants respond with more dense flowering, far greater seed production and a reduction in vegetative growth.

The annual rainfall at areas where Vigna trilobata grows ranges from 700–900 mm (28–35 in).

[4] Vigna trilobata is cultivated in India, Pakistan, and Sudan for short-term pasturage.