Cortinarius californicus

Cortinarius californicus

Can be recognized by a smooth, hygrophanous, burgundy-reddish, often umbonate cap, bright orange to reddish orange gills, and a bright purple KOH reaction on the tissue. As it ages, C. californicus loses its distinctive coloration, becoming dingy orange-brown overall.
Cortinarius californicus  Cortinarius californicus,Fall,Geotagged,United States

Naming

Dermocybe californica

Habitat

Solitary to scattered to clustered in humus under tanbark oak and conifers (fir, spruce); not uncommon, fruiting from fall through early winter

References:

Some text fragments are auto parsed from Wikipedia.

Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyCortinariaceae
GenusCortinarius
SpeciesCortinarius californicus