Agaricus bisporus, with silvery white mycelium, fast growth speed, difficult to be covered by fungi, solitary fruiting body, round, white, scaleless, thick mushroom cover, difficult to open umbrella, short and straight stalk, white pulp, hard tissue, semi-membranous fungus ring on stalk, and silvery brown spores. One of the most common varieties of edible fungi, the meat is plump. Originated in Europe and North America, human beings have been eating it since at least the ancient Greek times, and artificial cultivation began in France and other places in the17th century, and now it has been widely planted all over the world.