26 



Mycologia 



writer, or in company with Dr. H. H. York, to whom the writer 

 is much indebted for assistance. Various other individuals also 

 contributed collections and such are credited in the list. Special 

 thanks are due to those mycologists mentioned f or determinations 

 of various collections, as they have thereby added to the com- 

 pleteness and accuracy of the list. 



In closing this introduction I cannot fail to mention one of 

 the unsolved problems encountered in the spruce forests of this 

 region. Many individuals of the red spruce (Picea rubens) are 

 here attacked by a heart-wood decaying organism producing a 

 " carbonizing " type of decay somewhat similar to that produced 

 in structural timbers by Trametes carnea. The attacked heart- 

 wood becomes reddish-brown and shrinks and cracks both longi- 

 tudinally and transversely. In the final stages of decay the wood 

 crumbles to a fine dry powder when rubbed between the thumb 

 and finger. The fate of such trees is sooner or later to become 

 windthrown, breaking ofif usually within six feet of the ground, 

 indicating that the fungus is especially active in this region of 

 the trunk. Although this disease was recognized early in the 

 season and a constant lookout kept for sporophores, none were 

 found that would in any way indicate the species responsible for 

 the damage caused. The trees are from 5 to 15 inches in di- 

 ameter, breast high, at the time they are wind thrown. That 

 the causal organism is a member of the Polyporaceae there is 

 little room for doubt, but its generic and specific identity remain 

 to be determined. 



FUNGI IMPERFECT! 

 1. Order Sphaeropsidales 



1. Leptothyrium perichymeni (Desm.) Sacc. On leaves of Lonicera sp. 



North Conway, No. 5266. Determined by Mrs. F. W. Patterson. 



2. Septoria acerina Peck. On leaves of Acer pennsylvanica. North Conway 



and Willey Station. Nos. 5695 and 5696, respectively. Determined by 

 Dr. J. J. Davis. 



3. Septoria rubi West. On leaves of Rubus villosus. North Conway. No. 



5697. 



4. Septoria saccharina E. & Ev. On leaves of Acer saccharum. Crawford 



Notch. No. 5690. Determined by Dr. J. J. Davis. 



