BOLETUS. 119 



Stem, equal, annulate, yellow above the annulus, red or 



red with ^^ellow stains below. 



Pileus two to five inches broad. 



There are several locaHties in the Valley where it is quite common in 

 its season, during August and September. Minesite woods is the best 

 place to look for it. 



B. subluteus. Pk. The Yellow Boletus. 



Pileus, convex plane, viscid when moist, often obscurely 

 virgate spotted, dingy yellow, inclining to ferruginous brown, 

 flesh whitish to yellow. 



Tubes, plane or convex, adnate, small, subrotund, yellow, 

 becoming ochraceous. 



Stem, slender, pallid or yellowish, dotted above and below 



the annulus with reddish glandules, annulus membranaceous, 



glutinous, collapsing, forming a narrow band around the 

 stem. 



Spores, subfusiform, ochraceo-ferruginous, .0003 to .0004 



inch long, .00016 to .0002 broad. 



Pileus one and one-fifth to three inches broad. 



The yellow Boletus is not common with us, but occasionally it is found 

 in mixed woods of pines and chestnuts. 



B. Americanus. Pk. 



Pileus, thin, convex, plane, very seldom umbonate, vivScid 

 when moist, slightly tomentose when young, soon glabrous, 

 sometimes vaguely dotted or streaked with bright red, flesh 

 pale yellow, pinkish gray on exposure to the air. 



Tubes, plane or convex, adnate, large, angular, pale yellow, 

 becoming sordid ochraceous. 



Stem, slender, never more than four lines thick, not at all 

 annulate, yellow, brownish toward the base, marked with 

 numerous brownish dots. 



Spores, fusiform .00035 to .00045 inch long by .00016 to 

 .0002 inch broad. 



