Morphological characteristics: small fruiting body. The hat is very small, hemispherical to bell-shaped The cap is about 3cm in diameter, smoky gray to brown, and the top is eggshell color or slightly dark. Wrinkled or cracked, shiny when dry, with fragments of Agaricus attached to the edge, which often disappear in the later stage. Mushroom meat is dirty and white. Fungal folds are slightly dense, vertical, unequal in length and gray, and often appear black-gray spots due to uneven maturity or spore shedding. The stipe is 16cm long and 0.2-0.6cm thick. The upper part is white powder, the lower part is lavender, often twisted and hollow inside. Spores are smooth, black, lemon-shaped,1-17 μ m× 7-12 μ m. The folded sac is approximately cylindrical or rod-shaped. Economic value: There is generally no gastrointestinal reaction after this poisoning. The onset is faster, mainly manifested as mental disorders, singing and dancing, laughing wildly, hallucinating, and some have difficulty sleeping or speaking. Its toxin is gymnospermin, etc. Because poisoning causes dancing and laughing, people call it dancing bacteria or laughing bacteria. It grows on feces, also known as fecal bacteria. Commonly known as "dog urine moss" in the north.
Name source: it's a poisonous mushroom that grows in smelly corners or dry dung! This poisonous mushroom grows in the place where dogs often lift their hind legs to pee, hence the name "dog urine moss".