Saproamanita thiersii

Saproamanita thiersii (formerly Amanita thiersii), commonly called Thiers' lepidella, is a North American saprotrophic basidiomycete fungus in the genus Saproamanita. It is a white, small mushroom. Its cap is convex, measuring 3.5–10 centimetres (1+1⁄2–4 inches) across, and the stipe is 8–20 cm (3–8 in) long. The spore print is white. Originally described from Texas but today found in ten states of North America, the mushroom grows in lawns, pastures and prairies. It is a saprotroph, living on decaying plant material, and not mycorrhizal as is the case with species of Amanita, where it was previously placed. Fruit bodies appear during July and August, either in isolation or in groups, and often form fairy rings. A genome sequencing project aims to study the cellulose decomposition capabilities of the fungus. It is probably poisonous....read more on Wikipedia.