Key to Gilled Mushrooms

* Gilled mushrooms, though more closely related to Boletes
* Yellow, decurrent gills
* Basal mycelium is either white or yellow
* Sometimes staining blue
* Above appearance similar to a bolete
* Velvety cap

* Not "true" gills but raised ridges

* These "gills" are hard as cardboard
* Grow on wood and possess no stem (sessile)
* Handled in the polypore key

* Gill attachment is free, or acutely adnexed; gills close
* Gills white or cream colored
* Cap margin may be striate
* Cap may be adorned with patches or worts
* May have a membranous annulus
* Volva or remnants
* Develops primoridially as a bulb
* Grows terrestrailly
* Spore print white to cream colored.

* Fragile consistency; shatters easily
* Stout stature
* Gills attached
* Stem short, never longer than the width of the cap
* Stem looks and breaks like a piece of chalk
* Cap convex to coushion-shaped, sometimes becoming flat and funnel shaped with age
* Not exuding latex
* No volva, no annulus
* Spore print white to cream to yellow
* Grows terrestrially

* Gills attached
* Commonly exuding latex
* Spore print white to yellow
* No volva, no annulus
* Grows terrestrially

* Gill attachment is free
* Gills white or green colored (one species)
* Cap may be adorned with patches, worts or fluff
* May have an annulus
* No volva
* Grows terrestrailly
* Spore print white (green colored in one species Green-Spored Parasol)

* Caps are convex or depressed
* Gill attachment decurrent
* Stem eccentric or absent
* Spore print white
* Grows from wood or burried wood

* Stem longer than cap width
* Gills attached, sometimes veined, white or pinkish
* Generally quite fragile
* Generally small to medium sized
* Spore print white
* Grows from, woodland duff, or humus

* Stem longer than cap width
* Stem wirey and elastic
* Gill attachment adnexed and sometimes collared
* Generally quite small (with the execption of Marasmias oreades)
* Spore print white to yellowish
* Grows from woodland duff or grass

* Fleshy, stout, medium-sized
* Gill attachment notched
* Grows terrestrially

* Gills shallow, sometimes veined
* Spore print white
* Grows from wood, woodland duff, and humus

* Gill attachment decurrent

* Gills think and waxy

* Cap convex to plane to umbilicate
* Gills decurrent

* Gill attachment is free

* Gill attachment is adnexed, adnate, decurrent

* Lor ipsum

* Gill attachment is free or acutely adnexed

* Gill attachment is free or acutely adnexed

* Lor ipsum

* Lor ipsum

* Lor ipsum

* Lor ipsum

* Lor ipsum

* Lor ipsum

* Lor ipsum

* Lor ipsum