A genus of fungi which form thick, bracket-like, non-stipitate fruit bodies which have a corky texture. P. betulinum is common on dead and dying birch trees (Betula species). The fruit body is semicircular to hoof-shaped, with a thick, rounded margin; the upper surface bears a thin greyish or brownish skin which may separate from the white flesh. See also razor-strop fungus.
Subjects: Plant Sciences and Forestry.