1、 Leaf difference

sweet bean leaflets are oblong or oval, about 3 to 5 cm long and about 1 to 2 cm wide, entire the leaves of Phaseolus vulgaris are opposite, simple and nearly heart-shaped. The terminal leaflets are broad ovate or rhomboid ovate, about 4 to 16 cm long and about 3 to 11 cm wide. The apex of the leaves is sharp, the base is round or wide wedge-shaped, the veins on both sides are villous, and the leaflets growing on the side are oblique

2、 Flower difference

sweet bean flowers are solitary or 1 to 3 arranged in racemose axillary, and the Corolla is white or purplish red a raceme of green beans, with flowers growing at the top of the total pedicel, oblique bracts, white, yellow, lavender or purple corolla, about 1.5 to 2 cm long

3、 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 the pods of the four seasons are strip-shaped, slightly inflated, 10 to 15 cm long and about 1 cm wide, glabrous, straight or slightly curved in shape. 4 to 8 seeds