OvERHOLTS : Some Colorado Fungi 



247 



cession of fungous genera and species throughout the season as 

 is the case in flowering plants. The fact that with the rapid 

 disappearance of the snow in June the earth warms up more 

 rapidly than in places at lower elevations, makes this type of 

 locality unusually favorable for studying this succession of forms. 



In 1 914 two days were spent in collecting in the vicinity of 

 Denver and Golden in company with Professor E. Bethel, and 

 those collections are included in this report. Professor Bethel 

 has also sent in at various times specimens collected in different 

 localities. Dr. Ramaley has supplied a small collection of speci- 

 mens from Boulder and Tolland. But by far the larger part of 

 the numbers here reported are from the vicinity of Tolland and 

 collected by the writer. 



Unfortunately the literature on American gill fungi is yet so 

 fragmentary that it has been impossible to identify a large per- 

 centage of the collections in that family. Undoubtedly a con- 

 siderable number of these are new to science but none such are 

 described at this time. 



The entire number of species listed in this report is 152. If 

 all the collections obtained were determined the list would be at 

 least twice as large. Even that number would represent only a 

 fraction of the entire number of species to be found in this local- 

 ity if the collecting could be extended over several entire seasons. 



The writer desires to acknowledge his obligations to the Uni- 

 versity of Colorado and especially to Dr. Ramaley for furthering 

 this work in all possible ways, and to other members of the lab- 

 oratory staff and the various students whose interest in the work 

 was decidedly helpful. In certain groups of these fungi the 

 determinations have been made by specialists and such deter- 

 minations have added considerably to the completeness and the 

 accuracy of this list. Due credit is given throughout the list for 

 determinations so made. 



ASCOMYCETESi 



1 All determinations of Ascomycetes were either made or verified by Dr. 

 F. J. Seaver. 



I. Order Sphaeriales 



I. Diatrypella verruciformis (Ehrh.) Nito. On Alnus. Golden, Alt. 7000 

 ft. June 14, 1914. No. 1767. 



