Distribution: P. ostreatus is a species complex that has representatives in temperate forests worldwide.
Habitat: Forests with deciduous components.
Substrate: Hardwoods, primarily alder and maple.
Spores: Spring, fall.
Conservation Status: Not of concern
Gilled, laterally stemmed, pale mushroom on hardwoods. Generally pale gray or beige or bone-colored, often with an inrolled margin. Can occur in large clumps on snags and logs of alder and maple. Ages to yellow.