Svensk Botanisk Tidskrift. 1912. Bd 6, h. 3. 



REMARKS ON S(3ME SPECIES OF THE GENUS 



POL\'P()RUS 



BY 



LARS ROMELL 



As y\e\\ known Elias Fries detecled and described a large num- 

 ber of new species, some of which are so rare that nobody seems 

 to have found them again. 



On the other hand there occur some species which do not 

 agree fully with any of the pubHshed descriptions. In some in- 

 stances such incongruity may be due to variations. In other in- 

 stances, when tlie description of a species which has not been re- 

 found agrees exactly in the most points and dilTers only in one 

 point, there may be reason to suspect that the diflerence be owing 

 to misprint or other error. I think, however, that such supposi- 

 tion should be admitted only in extraordinary cases and with the 

 utmost care and not before the region, where the described spe- 

 cies was found, is thoroughly searched through. 



At this occasion I will comment a little upon some such or else 

 interesting species of Polijporus and publish t\vo new names. 



For easy reference I will take the species in alphabetical order. 



Polyporus albidus. 



If I have interpreted this species correctly, it is rather common 

 in Sweden. It grows preferably on standing subrecent stubs of 

 Abies (rarely on Piniis), sometimes even on living trees. It is pu- 

 rely white (at least below and within) and has smaller size and 

 smaller pores than Pol. boredlis and does not occur so frequently 

 and so abundantly as that species. 



I would not doubt that it be the Irue Pol. albidus of Fries, if 

 there where not two other species to which it can be referred 

 with about the same probability, viz. Pol. acidiiliis and Pol. tra- 



