Curtis) Murrill, (1907) Tyromyces subtrimiticus Corner, (1989) Fomitopsis spraguei is a polypore isolated from Washington and Oregon.

[1] It can function as a plant pathogen for Quercus species, or as a detritivore for various hardwood logs.

[1] The bottom of the fungus may be white, buff, or pale brown, and may have a pink tint.

[1] The inside of the fungus if broken open is tough and corky, coloured white to grey.

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