CORRECTIONS AND ADDITIONS TO THE 

 POLYPORES OF TEMPERATE NORTH 

 AMERICA 



William A. Murrill 



During the dozen years or more that have elapsed, since the 

 publication of the two parts of North American Flora dealing 

 with polypores, much additional information has been gained that 

 is of value in determining the limitations and distribution of 

 species, as well as the history and nomenclature of type collec- 

 tions. This knowledge has come to me through recent American 

 collections in widely separated regions ; through more and better 

 specimens obtained from Europe; and through the increased 

 knowledge and more enlightened opinions of other students of 

 the family. 



When I undertook the study of polypores, at the suggestion of 

 Dr. Underwood, American collections were in very bad shape, 

 and I afterwards found that European collections were not much 

 better. This was particularly true of American specimens in 

 European herbaria, because few foreign workers took any special 

 interest in them, and they were incorrectly determined and care- 

 lessly handled. Through the valued assistance of American and 

 European mycologists, our knowledge of these plants in America 

 is now fairly accurate and complete, so far as the pileate forms 

 are concerned, and I hope that the same may soon be said of the 

 resupinate species. 



The notes I have to make at this time deal largely with the 

 nomenclature of temperate species already recognized, and with 

 the addition of new species to our flora. The former will be 

 taken up in the order in which they appear in North American 

 Flora; while the latter will be appended in an alphabetical list of 

 species, regardless of generic or other grouping. 



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