Hericium erinaceus, which is generally just bought, also has similar green spots. If you don't distinguish it carefully, many people will think it is moldy, but if you touch it, you will find that it is not easy to be wiped off, and you need to scrape it off with a knife, just as it grows on itself rather than attached to it. When soaked in water, the green spots on Hericium erinaceus did not scatter and float, but stuck to Hericium erinaceus all the time. When rubbed by hand, it still had a shape, indicating that the green color on Hericium erinaceus was not caused by mildew.

Hericium erinaceus is cultivated with mycelium (strain), and its root is close to or close to the rod and grows upside down. When we pick Hericium erinaceus, it is inevitable that there will be some hyphae. The black or green thing at the root of Hericium erinaceus is mycelium. They are not moldy Penicillium, and they are harmless to the body. If you mind, just scrape them off, just like we will stick some dirt when pulling up the roots of vegetables.

Hericium erinaceus belongs to fungi. In the process of cultivation, other strains will inevitably appear, resulting in some black, some green and a few pink, but the point is that black, green and pink are normal phenomena of Hericium erinaceus, which is harmless to our health. Just like growing vegetables, different grasses will grow next to them.

Of course, there is mildew caused by improper preservation. You can tell whether it is the mycelium of Hericium erinaceus or the moldy Penicillium colony by touching it with your hand.