Introduction: Wild soybean is an annual herb. Alias Wudou, wild soybeans. National Grade II protected plants. Annual entangled herb, the main root is slender, up to 20 cm, the lateral roots are sparse, the vine stems are slender, slightly quadrangular, densely covered with light yellow, close to the long bristles. Wild soybeans have many excellent shapes, such as salt and alkali resistance, cold resistance, disease resistance, etc., and have high nutritional value. There are distributions in most parts of China.

Basic information: wild soybean, leguminous; dicotyledon; angiosperm; belonging to the plant kingdom; upper and lower elevation: lower limit 150 meters, upper limit 2650 meters; genera: soybean genus;

Morphological characteristics: annual entangled herb, the main root is slender, up to 20 cm, the lateral roots are sparse, the vine stems are slender, slightly quadrangular, densely covered with light yellow, close to the long bristles. Leaves alternate, 3 leaflets, total petiole 2-5.5 cm long, pubescently pubescent; leaf blade long ovate-lanceolate, lanceolate long ovate or ovate, 2-2.5------ Centimeter, base rhomboidate, broadly cuneate or suborbicular, apex acuminate or absent, with short apex. Lateral leaf blade base often deflected, surface green, pale green on both sides, light yellow on both sides Close to the bristles, the veins slightly swelled on both sides, entire, small petiolate stalk short, densely covered with brown bristles, base with small stipules, small and needle-like. Flowers butterfly-shaped, reddish-purple, axillary racemes, calyx campanulate, 5-lobed, globose suborbicular, stamens often 10. Ovary superior, 1 room. The pods are oblong in shape and slightly curved, with 2-4 seeds.