Lepista sordida is a species of blewit mushroom found across the Northern Hemisphere. It is known to form fairy rings.[1]
References
^Choi JH, Fushimi K, Abe N, Tanaka H, Maeda S, Morita A, Hara M, Motohashi R, Matsunaga J, Eguchi Y, Ishigaki N, Hashizume D, Koshino H, Kawagishi H (2010). "Disclosure of the "fairy" of fairy-ring-forming fungus Lepista sordida". ChemBioChem. 11 (10): 1373–37. doi:10.1002/cbic.201000112. PMID20486242. S2CID32138682.