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Help, is this a Berkeley's Polypore?

No black staining / bruising.

Northeast Pennsylvania

Mostly shaded area, at edge of wooded area. Near some live and dead oaks and pine. Also a maple tree nearby. Closest to a dead pine stump that was ground down this summer. Lots of little gnats flying around it.




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Did darken somewhat. At first I thought this may be a black staining polypore, but it grew about 2 weeks earlier than other black staining polypores in this area and had a little bit different appearance to me, so wasn't sure. The others are just popping now. The black edges are hard / dry and get some sun. New pics attached. 



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You know, it's interesting. The more I look at the pore surface in that one photo I keep thinking about G. frondosa but the fronds seem way too large and spread out to possibly be that. I'm not sure I can say, someone else will surely be along to help though. 

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This is Meripilus sumstinei, Black-staining Polypore. When the fronds are large and approximating semi-circles, this species looks quit a bit like Berkeley's. Mature Berkeley's fronds are smoother (upper surfaces) with more even margins and it does not bruise black (or dark gray/brown). Grifola has smaller fronds that do not stain. 

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