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Gilled Polypore (Trametes betulina)

Gilled polypore (Trametes betulina, formerly Lenzites betulina) is a widespread bracket or shelf fungus which grows on dead hardwood trees and aids in their decomposition. The irregular "gills" on its undersurface are really just elongated pores, but nevertheless help to differentiate it from turkey tail (T. versicolor), which can bear a resemblance when viewed from above, but has typical pores underneath.


Gilled polypore (Trametes betulina). Focus-stacked composite. Kruse Rhododendron SNR, Sonoma County, California, USA.
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Gilled polypore (Trametes betulina), large collection of fruiting bodies emerging from an oak stump. Mount Tamalpais State Park, Marin County, California, USA.
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Gilled polypore (Trametes betulina), close-up of the underside of the mushroom, revealing the intricate, maze-like structure of the gills. Focus-stacked for increased depth of field. Mount Tamalpais State Park, Marin County, California, USA.
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Gilled polypore (Trametes betulina), low-angle perspective detailing the gill structure of multiple fruiting bodies. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Gilled polypore (Trametes betulina) with moss and lichens on a fallen oak tree. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Gilled polypore (Trametes betulina), overhead view clearly showing the tendency of this fungus to envelop obstacles (in this case, pine needles and an oak leaf) instead of pushing them aside. Indian Grinding Rock State Historic Park, Pine Grove, Amador County, California, USA.
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Gilled polypore (Trametes betulina), low-angle view emphasizing the unique, gilled undersurface. Indian Grinding Rock State Historic Park, Pine Grove, Amador County, California, USA.
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Gilled polypore (Trametes betulina), wide-angle view depicting several fruiting bodies on a fallen oak tree, horizontal composition. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Gilled polypore (Trametes betulina), wide-angle view depicting several fruiting bodies on a fallen oak tree, vertical composition. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Gilled polypore (Trametes betulina), young specimens emerging from a fallen oak tree. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Gilled polypore (Trametes betulina), young specimens emerging from a fallen oak tree. Black Diamond Mines Regional Preserve, Antioch, Contra Costa County, California, USA.
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Next: Purple toothed polypore (Trichaptum abietinum)



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All images copyright Timothy Boomer. All rights reserved worldwide.