2, size: elm mushrooms are not the bigger the better. Growing particularly large is likely to be hormone catalyzed, this kind of elm mushrooms eat will bring harm to human health, the normal size of the elm mushrooms instead of tender and delicious taste, do not buy overcooked mushrooms, in order to seven or eight ripe the best.
3, cap: generally choose the mushrooms whose cap is a little inwardly rolled or not fully opened, and the best is the one whose membrane is not ruptured under the cap, only this kind of mushrooms is the most nutritious and good mushrooms. If the cap is completely open or unfolded, it will be very old in taste and lose a lot of nutrients.
4, color: blackened matsutake mushrooms may have deteriorated, and even sulfites, this elm yellow mushrooms are harmful to the human body. Color yellowing for the Agaricus mushroom contains more fungal polysaccharides, and air contact changes in the normal performance; in the selection of the general choice of brown, white is good.
5, smell: fresh elm mushrooms is a refreshing pungent mushroom flavor, placed for a long time and deterioration will have a bad smell.