Collybia phyllophila, commonly known as the frosty funnel or the leaf-loving clitocybe, is a fungus in the family Tricholomataceae.

Collybia phyllophila was first described by Christiaan Hendrik Persoon as Agaricus phyllophilus in his work "Synopsis methodica fungorum" in 1801.

[4] In 1871, it was renamed to Clitocybe phyllophila by Paul Kummer in his book "Der Führer in die Pilzkunde" (The Guide to Fungi).

[6] The cap margins are rolled or curved to broadly wavy, with irregularly raised lobes when mature.

[2] The fruiting bodies of Collybia phyllophila are poisonous as they, similar to other clitocyboid mushrooms contain muscarine.

These look-a-likes are usually smaller, have white spore powder, more decurrent gills and a differently structured cap top layer.

[12] Clitopilus prunulus, is also very similar, though it can be distinguished by its strong floury odour, and larger spores, as well as pink gills that separate easily from the cap.

[10] Collybia alboclitocyboides can be distinguished from C. phyllophila by the subregular flesh of its gills and by how the hyphae in the top layer of its cap run completely parallel to the cap's surface[2] Leucocybe connata can also be confused with it, though unlike it, the frosty funnel does not react to ferrous sulfate.

[14] Faded fruiting bodies of Clitocybe odora also sometimes look similar to it, but smell distinctly of aniseed.