1、 Different forms

Viola is a perennial herb belonging to Violaceae and viola. It has no aboveground stem and is a little shorter. It is about 4-14cm high. At the fruit stage, it can reach more than 20cm high

Dingcao is a biennial grayish green herb. It is a whole grass belonging to poppy family and corydalis. It is higher, has a main root, about 10-50 cm high, and has branches at the base of the stem. Its color is grayish green. The two plants are somewhat similar, but they still have many differences and different effects

2、 Leaf difference

The leaves of Viola latifolia are basal, the leaves of the lower part are relatively small, in the shape of triangular egg or narrow egg, and the leaves of the upper part are relatively long, in the shape of oblong and oblong egg, with a length of about 1.5-4cm and a width of about 0.5-1cm, and the color is pale white or light green

The leaf shape of Sophora flavescens is oval in outline. The upper part of the leaf is the same as the lower part. The length of the leaf is about 1.5-3.5 cm and the color is grayish green

3、 Different flowers

The flower of Viola Medicina is medium-sized, the color is purple or lavender, sometimes white, and the position of the throat has purple stripes

The flower color of Sophora flavescens is pink to lavender, and its shape is relatively flat