Mousepee Pinkgill - Entoloma incanum

Cap: Convex with a central depression; dry; bright yellowish green
Gills: Attached; nearly distant; short gills present; pale yellow
Stem: Equal; somewhat greasy; hollow; similar color to cap; white basal mycelium
Habitat: Leaf litter in a mixed forest

*If you're wondering about the common name, 'mousepee' is because the mushroom smells like mouse urine, and 'pinkgill' is because the gills eventually turn pink with maturity.