Paxillus panuoides

Scientific name:  Paxillus panuoides Fries
Derivation of name:  
Synonyms:  Tapinella panuoides ((Fr.:Fr.) Gill.
Common name(s):  Stalkless Paxillus.
Phylum:   Basidiomycota
Order:   Boletales
Family:   Paxillaceae
Occurrence on wood substrate:  Scattered or in overlapping
clusters on conifer logs, stumps, and timbers in service; May
through November.  
Dimensions:  Caps 2.5-10 cm wide.  
Cap: Olive-yellow to yellow-brown; dry; downy to smooth;
margin incurved when young, becoming thin, uplifted, and wavy
at maturity.    
Gills: Yellowish; radiating from point of attachment; sometimes
forked, often wavy and corrugated near base but sometimes
straight; easily separated from cap.
Spore print:Yellowish.
Stipe: Absent.
Veil: Absent.
Edibility: Poisonous.
Comments: Paxillus corrugatus looks somewhat like this
species. The gills are darker and more corrugated but the
potential exists for confusion. Consult Bessette for additional
information.. Microscopic analysis of spore size may be required
to provide certainty of identification. 

More information at RogersMushrooms.com:   

    

Figure 1. An overlapping cluster of Paxillus panuoides.
Photo © Steve Nelsen.

Figure 2. Note the wavy or corrugated gills near the point
of attachment. Photo © Steve Nelsen.