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ID help please? Tried for an hour and couldn't find anything that looked like it.
Big cap, 11-12" diameter. Found in a mixed forest next to a river in upstate new york. Can't remember all the trees but a lot of black walnut. Sandy soil, sandstone bedrock I thing. Near a big river gorge.
No gills, pore tubes. Spongey lookin. Oddly regular wavy pattern around rim of cap.