Meripilus sumstinei, commonly known as the giant polypore or the black-staining polypore, is a species of fungus in the family Meripilaceae.

Originally described in 1905 by William Alphonso Murrill as Grifola sumstinei, it was transferred to Meripilus in 1988.

[1] It is found in North America, where it grows in large clumps on the ground around the base of oak trees and tree stumps.

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