8 



AMERICAN BOLETES 



Tubes whitish, becoming yel- 

 low; mouths small, circu- 

 lar. 



Tubes yellow; mouths large 

 and angular, especially 

 near the stipe. 

 Tubes small, yellowish, be- 

 coming brick-red on drying 

 or when bruised; pileus 

 large, 913 cm. in dia- 

 meter and 3 cm. thick. 

 Tubes changing to blue when 



wounded. 



Tubes at first grayish-white, 

 discolored later by the 

 spores; stipe bluish- 

 green at the top. 

 Pileus conspicuously re- 



ticulate-rimose. 

 Pileus not reticulate-rim- 



ose. 



Tubes yellow and large; stipe 

 and pileus usually red, the 

 latter often cracked. 



43. C. Roxanae. 



44. C. suUomentosus. 



45. C. tomentipes. 



46. C. fumosipes. 



47. C. sordidus. 



48. C. communis. 



i. CERIOMYCES RUSSELLII (Frost) Murrill 



Pileus convex, 3-7 cm. broad, 2-3 cm. thick; surface dry, 

 slightly viscid when moist, clothed with a thick tomentum 

 agglutinated in raised squamules, presenting a reticulate appear- 

 ance, often rimose-areolate, light-brown to isabelline with 

 brown patches; context thin, cremeous, unchanging, taste mild, 

 slightly salty; tubes plane, adnate or very slightly sinuate, 

 depressed, cremeous when young, dark-flavous with a tinge of 

 green at maturity, mouths large, angular, uniform, edges thin; 

 spores ellipsoid, distinctly longitudinally striate, olivaceous, 

 I 5~ I 7 X 7-8 ju; stipe long and slender, tapering upward, very 

 coarsely reticulate and fluted, the margins broad and lacerate, 

 swelling in wet weather, somewhat glutinous even in dry weather, 

 bright-pinkish-flesh-colored throughout, the depressions usually 

 not darker, firm, solid or slightly stuffed, yellow within, 5-12 cm. 

 long, 11.5 cm - thick at the base. 



Occasional in open deciduous woods from New England to 

 Mississippi and west to Wisconsin. 



2. CERIOMYCES BETULA (Schw.) Murrill 



Pileus hemispheric, 3-9 cm. broad, 1-2 cm. thick; surface 

 smooth, viscid, shining, perfectly glabrous, latericeous to almost 



