Cortinarius

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Cortinarius (family Cortinariaceae) A very large genus of fungi in which the mushroom-like fruit bodies have a fine, cobweb-like cortina when young. The gills are rust brown at maturity, and the spore print is rust-brown. Cortinarius species are found on the ground in woodland, where they often form mycorrhizal associations with trees. The numerous species are not easy to distinguish from each other in the field.