Hohenbuehelia petaloides

Scientific name:  Hohenbuehelia petaloides (Bulliard:Fries)
Schulzer
Derivation of name: Petal- means "petal" or "leaf" in reference
to the elongated petal-like appearance of these mushrooms. 
Synonyms:  Pleurotus petaloides
Common name(s):  Leaflike oyster; Shoehorn oyster mushroom.
Phylum:   Basidiomycota
Order:   Agaricales
Family:   Pleurotaceae
Occurrence on wood substrate: Saprobic; soiltary or in clusters
on logs and stumps; June through September.   
Dimensions:  Caps 2.5-7.5 cm wide, 5-10 cm long; stipes are
very short (1-4 cm). 
Cap: Fan-shaped to funnel-shaped; brownish or paler; with a
gelatinous feel; smooth to minutely hairy; sometimes with a whitish
bloom when young.       
Gills: Decurrent to base of stalk; whitish to grayish; margins are
finely fringed (use hand lens).
Spore print: White
Stipe: Lateral, stubby, hairy, whitish.
Veil: Absent.
Edibility: Edible.
Comments: Some closely related species may need to be
differentiated from Hohenbuehelia petaloides using microscopic
characteristics.

More information at TomVolkFungi.net:   


Figure 1. These collected specimens exhibit the typical brownish,
fan-shaped caps with stubby, lateral points of attachment of this
species. Photo © Dorothy Smullen.

Figure 2. Brownish caps and whitish gills of leaflike
oyster. Photo © Steve Nelsen.

Figure 3. Note the whitish bloom and decurrent gills
visible on these specimens. Photo © Steve Nelsen.