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Fomitopsis betulina · beržinis pintenis
- Piptoporus betulinus, Polyporus betulinus
- Birch Polypore, Birch Bracket, Razor Strop
- Birkeporesvamp
- Birkenporling
- beržinis pintenis
- brūnā bērzupiepe
- pniarek brzozowy
- björkticka
Fomitopsis betulina is one of the most common species of brown rot fungi. The geographic distribution of F. betulina appears to be restricted to the Northern Hemisphere, including Northern America, Europe, and Asia. It is only found on birch trees.
It is a necrotrophic parasite on weakened birches, and will cause brown rot and eventually death, being one of the most common fungi visible on dead birches. It is likely that the birch bracket fungus becomes established in small wounds and broken branches and may lie dormant for years, compartmentalised into a small area by the tree's own defence mechanisms, until something occurs to weaken the tree. Fire, drought and suppression by other trees are common causes of such stress.
Vaisiakūniai vienamečiai, išgaubtų kepurėlių pavidalo, šonu priaugę prie substrato. Kepurėlių paviršius padengtas luobele, balkšvos spalvos. Auga įvairiuose miškuose ant išvirtusių beržų kamienų, šakų ir kelmų. Sukelia aktyvų rudąjį medienos puvinį.
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