1、 The appearance of the stem

Wild yam generally refers to pangolin, which has many aliases, also known as ground keel, chicken bone, longdioscorea, Longxi, etc. It is a perennial herb with a length of 5 meters. Its rhizome grows horizontally, with many branches on it. Its skin is yellowish brown, which is easy to become flakes and fall down. The cross section is yellow

2、 Blade appearance

The leaf is 10-20cm long and about 9-13cm wide. It is palmately heart-shaped. There are cracks of different sizes on the edge, generally 5-7 cracks. It is yellow green with luster on it. There is no hair distributed on it, or it is sparsely distributed with small white hairs. It is more and more densely distributed on the leaf veins

3、 The appearance of flowers

The flowers are unisexual. After opening, the color of the flowers is yellow green, and the flower shape is relatively small. The position of the base is generally in the shape of a small umbrella composed of 2-4 small flowers, and the flowering period is from June to August

4、 Capsule appearance

The capsule is oval or oval, with three wings on the edge. The wings on each edge are different in size. Generally, the length is about 2cm and the width is 1.5cm. After maturity, it is withered yellow, and the fruit period is from July to September