When: 2011-05-09

Collection location: Beaver Co., Pennsylvania, USA [Click for map]

Who: Bob Zuberbuhler (Bob Z)

No specimen available

These 2" brown, stalked polypores were found on the side of a barkless hardwood log. The dark, rather rigid stalk was firmly attached to wood and had a 90 degree bend. The cap was densely hairy, flat with a central depression and the very thin margin was downturned. In some of the specimens dark brown pores were present over part of the underside (Photo 3). There seemed to be a second, superimpossed layer with white pores and some tubes that had become toothed. In the cross section (Photo 4) the dark brown covering overlies the whitish flesh; below that is a brown tube layer, and under that a layer of whitish tubes and tube teeth.

Could the two tube layers just be first and second year growth? Or could the white layer be a toothed polypore parasitic on the brown polypore? I’ve never heard of this and would appreciate help.


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By: Irene Andersson (irenea)
2011-06-01 08:18:22 CEST (+0200)

I think you are right about this being Polyporus brumalis, and with another polypore as a parasite on it.

Maybe some kind of Antrodiella, which includes many different species on other polypores. It reminds a lot of Antrodiella americana, but as far as I know, it’s only growing on Hymenochaete species.

Created: 2011-05-10 02:34:18 CEST (+0200)
Last modified: 2018-11-09 09:02:43 CET (+0100)
Viewed: 91 times, last viewed: 2019-08-23 21:28:08 CEST (+0200)
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