Collybia     Genus

Cortinarius husseyiKey to Gilled Mushrooms     Key
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.

TricholomaAgaricales     Order
Fruiting body containing fibers (usually in the stalk)

Amanita onustaWhite Spored     Suborder
Spore print "light-colored": white or buff, sometimes tinged with pink or tan. Greenish and (except for the Russulales) yellow spore prints also go here
Stalk fibrous, not fracturing like a piece of chalk

TricholomataceaeTricholomataceae     Family
None of the special features distinguishing the other white-spored genera:
Gills not free, as in the Lepiotas and Amanitas
Basidia not extra-long, as in the Hygrophoraceae
Spores smooth, except for Lentinellus

Asterophora parasiticaFungicolous Trich     Subfamily
Cap less than an inch across
Growing on other fungi, usually on their blackened and squishy remains

Collybia     Genus     (Fries) Staude

Collybia racemosa


Narrow down your identification:

Collybia cirrhata
Stem lacking sclerotium, branches, but with white rhizomorphs at base
Cap up to 1 cm across

Collybia cookei
Sclerotium yellow to orangish, about the same diameter as the cap (up to 1 cm across)

Collybia racemosaCollybia racemosa
Numerous short side branches, bearing conidia on their swollen ends
This is the only one whose fruiting body isn't pinky-orangy
Sclerotium black

Collybia tuberosa
Sclerotium reddish-brown, oval, shiny (described as resembling an appleseed, though it can get a little large for that)
Cap diameter and sclerotium length about the same (up to 1/2")