Entoloma mammosum, commonly known as the bell-shaped Nolanea, is a species of fungus in the family Entolomataceae.

The fruit bodies are small and nippled, with a striate cap, salmon-colored gills, and a stately stalk.

It is typically found growing in feather moss under spruce and Jack pine in the summer and fall.

[2] The fungus was originally described by Carl Linnaeus in 1753 as Agaricus mammosus.

American mycologist Lexemuel Ray Hesler transferred it to Entoloma in 1967.