Tricholoma is a kind of wild Agaricus blazei growing on Mongolian grassland. It usually grows in places with sheep bones or sheep dung, and it tastes extremely delicious. Because the local products of Tricholoma mongolica have been exported to the mainland through Zhangjiakou City, Hebei Province, Zhangjiakou is the distribution center of Mongolian goods, so it is called "Tricholoma mongolica". Because of its small output and large demand, it is still the most expensive mushroom in China market. The main producing areas of Tricholoma are Wudong Banner, Xiwu Banner, Abaga Banner, Hulunbeier City, Tongliao and other grassland areas in Ximeng. This kind of mushroom is usually shipped to Zhangjiakou for processing and then sold to the mainland. When Guo Moruo visited Zhangjiakou in 1958, he wrote a poem praising Tricholoma: "The name of Tricholoma is all over the world. I don't know why it's called Tricholoma. " "Originally from Zhangjiakou, there are many mushrooms on the mouth." The poet gave the origin of the name Tricholoma. Tricholoma is also known as White Mushroom, Mongolian Tricholoma, Pan Yun Mushroom and Silver Plate. Silver plate, also called camp plate, is the top grade of Tricholoma. Tricholoma, the so-called Tricholoma, is actually not one kind, but a general term for many mushrooms gathered in the distribution center. According to the traditional name, there are at least the following kinds: green leg mushroom, fragrant apricot, black mushroom, chicken leg, crystal mushroom, mercury plate, Ma Lian stem, Meng Xi white mushroom and so on. Tricholoma, fungi, basidiomycetes, Tricholoma, Tricholoma. Also known as white mushrooms, white mushrooms and so on. The fruiting body is umbrella-shaped. Main producing areas: Inner Mongolia: Ximeng grassland areas such as Wudong Banner, Xiwu Banner, Abaga Banner, Hulunbeier City and Tongliao. Hebei: Folding editing of morphological features of this section in Zhangjiakou area. Tricholoma fruiting bodies cluster, forming a mushroom circle, medium to large. Cap diameter 17 cm, hemispherical to flat, white and smooth, with initial edge involved. Mushroom meat is white, thick and fragrant. Bacterial folds are white, curved and dense, with different lengths. Petiole is medium, stout, 3.5-7 cm long, 1.5-4.6 cm thick, slightly enlarged at the base, and white and solid inside. Spores are oval. The morphological characteristics of several common Tricholoma are as follows. The cap of Tricholoma tomentosa is large and thick, initially hemispherical, with curled edges and flat climbing, with a diameter of 5- 12 cm, slightly sticky surface, light reddish brown or yellowish brown, light lid edge and fine scales; The flesh turns white and the wound turns black; The folds are dense and narrow, curved, with different lengths, white, and slightly reddish brown when mature. The stalk is 3-8 cm long and 1-3 cm thick, erect, medium-sized, white, slightly reddish brown at the later stage, slightly enlarged at the base, colorless vesicles, oval or nearly spherical, smooth surface, 5.6-8 microns x3-5.6 microns, and white spores. In addition to the above varieties, there are Hong Kong giant Tricholoma, Sichuan leopard Tricholoma and other varieties.