Lepista nuda

Collybia nuda, commonly known as the blewit, wood blewit or blue foot and previously described as Lepista nuda and Clitocybe nuda, is a species of fungi. Described by Pierre Bulliard in 1790, it was also known as Tricholoma nudum for many years. It is morphologically similar and related to the field blewit, Collybia personata; both mushrooms were reassigned to the genus Collybia in 2023.

The species is native to Europe and North America. It is found in both coniferous and deciduous woodlands. It has been cultivated in Britain, the Netherlands and France. It is a widely consumed edible mushroom.