1、 Leaf difference

The leaves of green beans are opposite single leaves, which are close to the heart shape. The leaflets growing at the top are broad ovate or rhombic ovate, about 4 to 16 cm long and about 3 to 11 cm wide. The apex of the leaves is sharp, and the base is round or wide wedge-shaped. The veins on both sides are villous, and leaflets grow when growing on the side

The leaves of concanavalis are pinnately compound leaves with three leaflets. The leaflets are oval, about 8 to 15 cm long and about 8 to 12 cm wide. The apex of the leaves gradually becomes sharp, the base is wide wedge-shaped, and there are fine villi on both sides of the leaves

2、 Flower difference

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

Concanavalis raceme with white or pink corolla. Petals broadly elliptic

3、 Fruit difference

Four season pods 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

Concanavalis pods are banded, slightly curved, 20 to 35 cm long and 4 to 6 cm wide, with oval or long oval seeds and red or brown seed coats