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Postia caesia

Postia caesia

Common Name: Blue Cheese Polypore

Synonyms: Tyromyces caesius

Substrate: Wood

Location: Hardwood Forests

Spore Color: White

Pore Color: White


This mushroom used to be in the genus Tyromyces because of the soft, watery texture to the polypore. This species should have a blue-gray hairy surface, which is how it is distinguished from Tyromyes chioneus.


Tyromyces chioneus has a white surface. T. fragilis occurs on conifers. T. lacteus lacks a fragrant odor. 


Postia caesia

9/15/12 - McCormicks Creek SP - Spencer, IN

Postia caesia

7/28/12 - TC Steele Historic Site - Peckerwood Trail - Brown County, IN