Anyway, it's a poisonous fungus. Yours is like a poisonous umbrella. It's difficult to identify because it hasn't grown up yet.

Mushroom is a kind of fungus, and there are about 3250 known species. Among them, there are about 200 kinds of poisonous bacteria, but most of them have slight or uncertain toxicity. There are more than 20 kinds of bacteria that often cause serious poisoning, namely: poisonous fly umbrella, poisonous russula, poisonous umbrella, red boletus, white poisonous umbrella, poisonous pink pleated fungus, a nest of yellow milk mushrooms, autumn helmet umbrella, white poisonous umbrella with hairy handle and Pleurotus eryngii.