1、 Leaf difference

The leaves of Lepidium sativum are sparse or leafless, the basal leaves are rosette shaped and long obovate, the top of the leaves is slightly blunt, the edge has sparse fine teeth or is close to the whole edge, the stem leaves are long oval or oval, the top of the leaves gradually becomes sharp, the base is wedge-shaped or gradually becomes round, the rounded leaves have fine serrations, and the leaves have no handle

The petiole of shepherd's purse is 5 to 40 mm long, the stem leaves are narrow lanceolate or lanceolate, 5 to 6.5 mm long and 2 to 15 mm wide, and the base is arrow shaped

2、 Flower difference

There are 25 to 90 flowers in the raceme of Lepidium, which are dense in corymbose shape. The petals are yellow, turn white after flowering, appear inverted wedge, grow about 2 mm, and the top is concave

Shepherd's purse raceme terminal and axillary, pedicel 3 to 8 cm long, sepals oblong, 1.5 to 2 mm long, petals white, ovate, 2 to 3 mm long