From: mokbck@hetnet.nl   
      
   Thank you both for your answers. I think it is indeed Inonotus obliquus. The   
   description of this fungus seems to match with the discoloration and the   
   structure of the stem of the birch.   
   Thanks again   
   Marcel   
      
      
   "Basr"  schreef in bericht   
   news:437ee4a3$0$2336$ba620dc5@text.nova.planet.nl...   
   > Can someone tell me what the brown spot on this birch is. I thought it is   
   a   
   > kind of rust but in my books I could not find a description of a fungus   
   that   
   > causes such spots om stems of birches.   
   >   
   > Thanks in advance   
   > Marcel   
   >   
   >   
   > http://home.hetnet.nl/~spleen   
   > Alvast bedankt   
   > Marcel   
   >   
   >   
      
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