Arrhenia hohensis

Arrhenia hohensis

Small sized, flat, hygrophanous, dark brown cap with margin that is striate when moist and sacalloped when old, gray-brown gills, equal stem colored as cap and mild odor
Arrhenia hohensis, Washington, USA differentiated from several similar species by time of fruiting (this is the earliest). Arrhenia hohensis,Geotagged,Spring,United States

Appearance

Cap - .5-1.6 cm across, convex with slightly depressed disc at first, margin appressed against stem then incurved to decurved, expanding to broadly convex or sometimes flat, disk usualy only narrowly and shallowly drpressed; hygrophanous, dark brown when moist, margin becoming somewhat paler when expanded, fading overall to brownish gray; appearing bald or disc fibrillose margin striate when most, crenate when old.
Flesh - very thin, soft and watery to pliant, colored as cap surface
Gills - broadly adnate then decurrent, distant, broad, grayish brown or brownish gray
Stem - equal, colored as cap

Naming

Omphalina hohensis
Clitocybe hohensis
Omphalina hohensis
Omphalina obatra

Habitat

on sandy soil, among lichens and mosses at times, May to July, September to November

References:

Some text fragments are auto parsed from Wikipedia.

information from MATCHMAKER (pacific NW mushroom identification key)
Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyHygrophoraceae
GenusArrhenia
SpeciesArrhenia hohensis