What is yam? How many types of yam are there?

1. What is

1. Appearance: Yam is a plant that can be used as both food and medicine, and is very common in life. It is a dried rhizome belonging to the Dioscorea family. It is cylindrical in shape, generally straight and slightly curved. The outer skin is yellow-white or light yellow with longitudinal grooves and some fibrous roots. It is about 15-30 cm long and 1.5-6 cm in diameter. The texture is relatively solid and heavy, the inside is white, the taste is relatively light, slightly sour and sticky.

2. Origin: Its main producing areas are Hebei, Henan and Guangxi, and it is also cultivated in Zhejiang, Hunan, Sichuan, Shandong, Guizhou, Shanxi, Shaanxi and other places.

3. Habits: It likes to grow in warm places and plenty of sunlight. It requires fertile and loose soil with good drainage. It is afraid of cold climates in winter and cannot withstand frost.

2. There are several

There are two main types of yam, common yam and field yam, which also has five variants. The main varieties include hemp yam, iron stick yam, water yam, small white mouth yam, fine hairy yam, etc. These varieties are relatively common.