From the BULLBTIN OF THE TORRBY BoTANICAL ClVB, 35 : 517-536,//.^^ I908. 



The Boleti of the Frost herbarium 



William A. Murrill 

 (with plates 36-40) 



A brief account of the life and botanical work of C. C. Frost was 

 published in the August number of Torreya, and the reader is re- 

 ferred to that account as a general introduction to the present more 

 critical- paper, which was made possible by the recent generous 

 loan of the Frost collection of Boleti by the University of Vermont. 



This collection is very rich in type material, containing prac- 

 tically all of Frost's published species and a number of species 

 still in manuscript, which I have treated separately. A number of 

 sheets of type specimens, or type duplicates, twenty or more, were 

 sent to C. H. Peck at Albany, where they are still well preserved. 

 Peck never saw Frost, nor the remainder of his herbarium. He 

 began work near the close of Frost's active life, but his advantages 

 appear to have been greater, and we find Frost turning to him 

 in 1874 for certain determinations and for assistance with the 

 Amherst Catalogue. 



There are a number of references in Frost's notes and descrip- 

 tions to the opinions of Peck regarding various species. There 

 are also four type specimens, or co-types, in the collection, which 

 were sent him by Peck, namely, B. anipliporus Peck, B. gracilis 

 Peck-, B. elbensis Peck, and B. palustcr Peck, but these are now, 

 unfortunately, in very poor condition. 



Frost kept a separate list of spore measurements of the Boleti ; 

 he was not particular about spore coloration. I have made a care- 

 ful examination of his types microscopically and find his figures 

 usually correct. 



517 



