518 Murrill: The Boleti of the Frost herbarium 



The following commentary represents my present views regard- 

 ing Frost's published and unpublished species. In connection 

 with the latter, I have purposely avoided the publication of any- 

 thing that would suggest a description, although Frost's diagnoses 

 are in most cases quite complete. 



Published species 



Boletus albus Peck. 



Represented by three fine plants. The species is only an 

 albino form of B. granulatus. 



Boletus alveolatus B. & C. 



There are no specimens bearing this name in the Frost her- 

 barium. An excellent description, however, of this species was 

 published in the Catalogue of Boleti of New England. 



Boletus auriporus Peck. „ . 



Seven good specimens are found under this name, which rw 

 always spelled with an extra "j" {aurisporus), probably becau^ 

 the spores as well as the tubes are yellow. These sP^fV 

 now about forty years old, have retained the yellow color in 

 tubes to a remarkable extent. 



Boletus bicolor Peck. 



Represented by eight faded and moulded plants. 



Boletus bovinus L. i Ap a 



Represented by eight fair to poor, more or iesb ^ 



specimens, which may be referred almost certainly to . g 



lotus. 



Boletus castaneus Bull. . . fi ve 



There are two sheets in the collection, one con ain 

 specimens and the other six, all well preserved. 



Boletus chromapes Frost. 



Represented by seven good plants. 



Boletus chrysenteron Fries. . 



Three faded plants represent this very common spec 



Boletus collinitus Fries. t d in P' ne 



One sheet contains three very poor plants co ec ^ ^. 



woods in autumn. The other sheet, containing fiv ^ nged t o $• 

 mens, was first labeled " B. granulatus" and later ci ^^ 

 collinitus. The first determination was correct for bo 





