2 THE POLYPORACEAE OF WISCONSIN. 



ardville, Iowa County; Prof. L. S. Cheney, Lake Superior Region; 



B. 0. Dodge, Algoma, Kewaunee County; Dr. E. H. Denniston, Dane 

 and Sauk Counties; Dr. C. E. Allen, Dane and Sauk Counties and 

 Madaline Island; Dr. J. B. Overton, Brule Eiver Region; Dr. R. A. 

 Harper, Dane and Sauk Counties. 



A large number of specimens have been sent to specialists for de- 

 termination and comparison, and I am especially indebted to Dr. 



C. H. Peck, Prof. J. B. Ellis, Prof. A. P. Morgan, Dr. N. Patouil- 

 lard, Prof. G. Bresadola, and Dr. Paul Henning for numerous iden- 

 tifications and notes on difficult and obscure species. I am also in- 

 debted to Prof. R. A. Harper for numerous suggestions and assist- 

 ance in many ways. 



The Distribution and Abundance of Polsrporaceae causing the 

 Decay of Timber Trees in certain Regions of 

 Northern Wisconsin. 



The territory in which I more specially studied the relations of the 

 poljrpores to the decay of timber trees, lies in Oneida, Vilas and Ash- 

 land counties, all of which are in the northern third of Wisconsin. In 

 Oneida county seven townships were quite thoroughly covered. Here 

 the most careful study was made of the Yawkey Lumber company's 

 stand of timber. In Vilas county about two townships north and 

 west of Star Lake were studied, consisting largely of the Merrill Lum- 

 ber Company's and Longely and Alderson's timber. In Ashland 

 county a little over one township was covered and practically all the 

 work was done in the Nash Lumber Company's forest near Shana- 

 golden. 



In Oneida county most of the land has been cut over and much of 

 it is covered with a young growth of poplar, birch and maple with 

 here and there a sprinkling of red and white pine. The forest which 

 has not been cut consists of white and red pine {Pinus Strobus L. and 

 Pinus resinosa Ait.), hemlock [Tsuga canadensis (L.) Carr] a little fir 

 [Abies balsamea (L.) Mill.], and now and then a group of jack or gray 

 pines {Pinus Banksiana Lamb). In the swamps, spruce [Picea mari- 

 ana (Mill.) BSP], arbor vitae (Thuja occidentalis L.) and tamar- 

 ack [Larix laricina (Du Roi) Koch] abound. Some deciduous trees 

 are also found here but not in great abundance except in the new 

 growth. Chief among these are sugar maple {Acer saccharum 

 Marsh.) a little red maple {A. rubrum L.) red oak {Quercus rubra 

 L.) yellow and red birches {B. lutea Michx. and B, nigra L.), American 



