Murrill: Boletaceae of North America 



7 



Boletus Spraguei B. & C. Grevillea 1 : 35. 1872. (Type from 

 New England.) 



This beautiful species, described from New York by Peck, 

 is rather common in the woods and mossy swamps of the 

 mountainous regions of the eastern United States and Canada. 

 It is distinguished from B. spectabilis by its lighter-colored 

 spores and the denser covering of reddish, fibrillose scales on 

 the surface of its cap. 



Doubtful Species 

 Boletinus borealis Peck, Bull. Torrey Club 22 : 206. 1895. 

 Described from dried specimens collected by Waghorne on 

 Capstan Island, Labrador. The types at Albany resemble B. 

 cavipes. 



2. Boletinellus gen. nov. 



Hymenophore annual, terrestrial or sometimes attached to 

 buried roots, pileus circular, varying to dimidiate at times; 

 surface dry, minutely tomentose to floccose-tomentose : context 

 white or yellowish, fleshy; tubes decurrent, large, shallow, elon- 

 gated, not easily separating, radiating, yellow, not covered with 

 a veil : spores elipsoid, smooth, some shade of brown : stipe 

 central, eccentric or lateral, solid, fleshy or spongy. 



Type species, Boletinus porosus Peck. 



Stem eccentric or lateral ; pileus reddish-brown, glabrous or 



minutely tomentose. i. B. merulioides. 



Stem central. 



Pileus dark chestnut, subtomentose. 2. B. castanellus. 



Pileus bright red, floccose-tomentose. 3. B. paluster. 



i. Boletinellus merulioides (Schw.) 



Daedalea merulioides Schw.; Proc. Acad. Sc. Phila. 4: 160. 

 1832. 



Paxillus porosus Berk. ; Lea, Cat. Cinn. Plants 54. 1849. 

 Boletus lateralis Bundy, Geol. Wise. 1 : 398. 1883. 

 Boletinus porosus Peck, Bull. N. Y. State Mus. 2 : 79. 1889. 



This species is well known throughout the eastern United 

 States from Canada to Alabama and as far west as Wisconsin. 

 It occurs gregariously in low wet places, especially about stumps 

 and decaying roots, where there is partial shade. In the speci- 



