Hessen's fine autumnal agaric is black and bright after being grown in foam, with thick meat and delicate taste. It is single piece, rootless and free of picking. It comes from the natural and pollution-free forest area of Heilongjiang Province and is the national planting base of autumnal agaric. Good fungus is strong, tenacious, not easy to crush by hand; The adulterated fungus is more fragile, slightly broken off with the hand is broken off, easy to soft in the mouth.