Pholiota spumosa

This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

Fruiting body containing fibers (usually in the stalk)

Gills not free
Spore print tan, orange, deep ochre, yellowish olive, olive brown, rusty or cinnamon brown or deep brown
Ring usually either absent or not membranous

Growing on wood

Cap usually more than 2" across, and sometimes up to 8; usually tan, yellow, or pumpkin-colored

Having more than one of the following characters:
Cap slimy (all slimy MediumToBigLignicolousBrownSpored mushrooms go here)
Cap covered with pointy or fibrillose scales (all MediumToBigLignicolousBrownSpored mushrooms with this sort of scales go here)
Cap often yellowish

Growing on wood
Neither cap nor stem scaly; perhaps with just a few scattered flakes or patches
Not as likely to be yellow as the Scaly Pholiotas

Cap up to 2 1/2" across; slimy; olive brown at first, becoming browner at the disk and yellow to greenish yellow towards the margin
Flesh yellow to greenish yellow
Gills sometimes notched, yellow or greenish yellow at first

Pholiota spumosa     (Fries) Singer