Oligoporus caesius
Mycotaxon 22(2): 365. 1985.
Common Name: none
Synonyms: Postia caesia (Schrad.) P. Karsten; Tyromyces caesius (Schrad.) Murrill; Polyporus caesius (Schrad.) Fries
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Overholts, L.O. (1967). The Polyporaceae of the United States, Alaska, and Canada. University of Michigan Press: Ann Arbor, MN. 466 p.