Cowpea, also known as cowpea, is a rich vegetable in summer. It is a cultivated species that can form long pods among cowpea species, and it is an annual winding herb. Alias beans, long-horned beans, ribbon beans, and nepotism beans. Contains various vitamins and minerals. The tender pods are fleshy and crispy, and can also be scalded, cooled or marinated. Pods are long and tubular, crisp and soft, and there are two kinds of white beans and mung beans. When purchasing beans, beans with uniform thickness, bright color, transparency and luster and full seeds are generally preferred, while beans with cracks, wrinkled skin, thin strips without seeds and insect marks on the skin are not suitable for purchase. Beans are nutritious and are meat in vegetables.

Annual twining, herbaceous lianas or suberect herbs, sometimes with twining tips. Stems subglabrous. Pinnate compound leaves with 3 leaflets; Stipules are lanceolate, about 65438±0cm long, with short spacing and straight lines at the insertion place; Leaflets ovate-rhombic, 5- 15 cm long and 4-6 cm wide, with acute apex, entire or nearly entire margin, sometimes lavender and glabrous.

Racemes axillary, with long peduncles; 2-6 flowers are clustered at the top of inflorescence, and there are often fleshy dense glands between pedicels; Calyx light green, bell-shaped, 6- 10 mm long, teeth lanceolate; Corolla is yellowish white, slightly blue-purple, about 2 cm long, each petal has a stalk, the flag petal is oblate, about 2 cm wide, the top is slightly concave, the base is slightly ear-shaped, the wing petal is slightly triangular, and the keel petal is slightly curved; Ovary linear and hairy.

The pods are drooping, erect or obliquely spreading, linear, 7.5-70(90) cm long and 6- 10 mm wide, slightly fleshy and swollen or solid, with many seeds; The seeds are oval or cylindrical or slightly kidney-shaped, 6- 12 mm long, yellow-white, dark red or other colors. Flowering period may-August.