Murrill: The Boleti of the Frost herbarium 52.^ 



Unpublished species 



Boletus aureobrunneus Frost. 



Two sheets, with three good specimens, represent this species, 

 which is synonymous with B. ornatipes Peck. 



Boletus canus Frost. 



Represented by two sheets, with three good plants and two 

 poor ones. They are probably B. edulis. 



Boletus diffractus Frost. 



Represented by two poor plants cut in half and hardly worth 

 studying. It is apparently near B. bicolor. 



Boletu.s Faklowi Frost. 



Three sheets, containing seven good specimens and two very 

 poor ones, represent this species, which is hardly distinct from B. 

 edit /is. 



Boletus flavo-aureus Frost. 



Collected in rich woods in August and September, 1867, and 

 represented by five good plants and six that are only fair. On the 

 type sheet is written, '' B. affinis Peck by first publication." 



Boletus glutinipes Frost. 



Represented by three good plants collected in moist woods in 

 1863. On the sheet is a good description, and the words, '' anr- 

 isporus Peck by first publication." 



Boletus gramimcola Frost. 



Three good specimens, collected on grassy ground in October, 

 represent this species, which can hardly be distinct from B. Clin- 

 tonianus. The specific name first selected by Frost was " grani- 

 inis," which was not in good form, and he soon changed it to 

 '' graininicola ". 



Boletus interruptus Frost. 



The collection contains three very poor plants of this species, 

 which would hardly repay study, especially as I find no description 



Boletus lenticularis Frost. 



Represented by fifteen good plants, collected during Septem- 

 ber and October on excavated earth in woods, accompanied by a 

 full description. I see no distinction between this species and B. 

 subtomentos2is. 



