524 Murrill: The Boleti of the Frost herbarium 



turn, only a form of B. liiridus. Even if Frost's species had been 



distinct, the name could not have been retained on account of B. 



Spraguei B. & C, published two years previously for B. pictus 



Peck. 



Boletus strobilaceus Scop. 



This common species is represented by five good plants. 

 Frost later changed the generic name to Strobilomyccs, in accord- 

 ance with Berkeley's classification. 



Boletus subtomentosus L. 



Represented by nine rather poor specimens, some of which 

 may be B. chrysenteron. 



Boletus tenuiculus Frost. 



Three poor specimens represent this species, the central one 

 apparently quite distinct from the other two. The description, 

 also, is very brief, leaving the identity of the species in doubt, 

 unless better authentic specimens exist elsewhere. 



Boletus unicolor Frost. 



This species was published by Peck in 1889 from manuscript 

 only. Frost's collection contains a single sheet with five poor 

 plants, which add little to the description. 



Boletus versipellis Fries. 



Represented by six good plants and four that are only fair. 

 They may be only a reddish brown form of B. scaber. 



Boletus viridarius Frost. 



This species, not distinct from B. Clintoniamis, was collected 

 on grass plats in October and November. It is represented by a 

 sheet with seven poor specimens and a piece of cardboard contain- 

 ing six good ones. 



Boletus viscosus Frost. 



The collection contains twenty-one plants, all rather poor, col- 

 lected in pine or fir woods in autumn. They are all alike, with 

 very short stem, well deserving the name B. hrevipes, assigned 

 them by Peck in the 38th Report, although probably only a form 

 of B. gramilatus. The name B. viscosus was untenable, having 

 already been used by Ventun. 



