144 



Mycologia 



Tubes changing to 

 blue when 

 wounded. 

 Tubes at first 

 g r a yish- 

 white, dis- 

 colored later 

 by the 

 spores ; 

 stem blu- 

 ish-green at 

 at top. 

 Pileus con- 

 spicuously 

 reticulate- 



rimose. 33. C.fumosipes. 



Pileus not re- 

 ticulate-ri- 



mose. 34. C. sordidus. 



Tubes yeflow and 

 large ; stem and 

 pileus usually 

 red, the ^latter 



often cracked. 35. C. communis. 



1. Ceriomyces Russellii (Frost) 



Boletus Russellii Frost, Bull. Buffalo Soc. Nat. Hist. 2 : 104. 

 1874. 



Described from specimens collected in New England by Rus- 

 sell. This is a very handsome and well characterized species, 

 closely allied to C. Betula but extending farther north in its range, 

 being found in open deciduous woods from New England to Mis- 

 sissippi and west to Wisconsin. 



2. Ceriomyces Betula (Schw.) 



Boletus Betula Schw. Schr. Nat. Ges. Leipzig 1 : 90. 1822. 

 Boletus Morgani Peck, Bull. Torrey Club 10: 73. pi. 55. 1883. 

 (Type from Kentucky.) 



Described originally from North Carolina and afterwards found 

 several times in that state, as well as in Georgia, Alabama, Ten- 

 nessee, Ohio and Kentucky. When Schweinitz moved to Penn- 

 sylvania, he doubtless confused C. Russellii with the plants he had 

 collected in North Carolina. The two species are, however, quite 



