Distribution: Northern hemisphere.
Habitat: Forests and woodlands.
Substrate: Wood.
Conservation Status: Not of concern
Soft, spongy, \\'cheesy\\' bracket or shelf-like polypore. Fruitbody off-white or pale blue-gray, staining or ageing blueish. Dries hard and brittle. Pores medium sized, round to angular. On dead conifers and hardwoods, causing brown rot.
PNW Herbaria: Specimen records of Postia caesia in the Consortium of Pacific Northwest Herbaria database
CalPhotos: Postia caesia photos