1、 Plant difference
Sweet beans are annual twining herbs, about 0.9 to 1.8 meters high, and all plants are hairless
Pea is an annual climbing herb, about 0.5 to 2 meters high. The whole plant is green, smooth and hairless
2、 Leaf difference
Sweet bean leaflets are oblong or ovoid, about 3 to 5 cm long and about 1 to 2 cm wide, entire
Pea leaves have 4 to 6 leaflets, oval, about 2 to 5 cm long and about 1 to 2.5 cm wide
3、 Flower difference
Sweet bean flowers are solitary or 1 to 3 arranged in racemose axillary, and the Corolla is white or purplish red
Pea flowers are solitary in leaf axils, or several flowers are arranged in racemes, usually white and purple
4、 Fruit difference
The pod of sweet bean is long and oval, about 5 to 10 cm long. There is a paper lining in the pod, and the seeds are round, usually 2 to 10, green
Pea pods are swollen, long oval, about 2.5 to 10 cm long and about 0.7 to 14 cm wide. The top is sharp, and the seeds are round and green