1, according to the trees. Ganoderma lucidum, which grows on some poisonous trees, is inedible, so which trees are temperate? After all, there are mango books, phoenix trees, pomegranate trees, loquat trees, lacquer trees, evergreen trees, croton trees, oak trees, etc., all of which are toxic; If it is ganoderma lucidum growing in these places, it is not edible;

2. According to the tree tongue. Because the tongue grows on trees, it is also in the wild, and it is easy to go moldy and deteriorate after long-term exposure to the sun and rain. If fungal plants are moldy, they will produce toxins, and such ganoderma lucidum can't continue to eat.

Ganoderma lucidum collected in the wild can't be taken casually, because some Ganoderma lucidum has medicinal value, and some Ganoderma lucidum has no medicinal value, so it is difficult for the public to distinguish them. "For example, the medicinal value of these more than ten kinds of Ganoderma lucidum found on Purple Mountain, such as Ganoderma lucidum with handle, Ganoderma lucidum with brown hole, Ganoderma lucidum with curved handle and hard-skinned Ganoderma lucidum, has not been medically proved, and only red Ganoderma lucidum, Ganoderma lucidum with pine, Ganoderma lucidum with yellow hole and laminated Ganoderma lucidum have anticancer effects.

The tongues picked by many people are easy to be mixed with moldy parts. Moldy tree tongues are poisonous. As a result, people who can't distinguish between good and bad tongues think that all tongues are poisonous. Good ganoderma lucidum can be used as medicine. In fact, in the treatment of liver diseases, the medicinal value of good ganoderma lucidum is much higher than that of cultivated ganoderma lucidum.