364 



MUSHROOMS, EDIBLE AND OTHERWISE 



Boletus felleus. Bull. 



The Bitter Boletus. 



Felleus is from fel, gall, bitter. The pileus is convex, nearly plane, at first 

 rather firm in substance, then becoming soft and cushion-like, smooth, without 

 polish, varying in color from pale ochre to yellowish or reddish-brown or chestnut, 



Figure 294. Boletus felleus. Natural size. 



Photo by Prof. Atkinson. 



flesh white, changing to flesh-color when bruised, taste exceedingly bitter, cap 

 three to eight inches in diameter. 



The tube-surface is white at first, becoming dull pinkish with age or upon 

 being cut or broken ; rounded upward as it reaches the stem, attached to the stem, 

 mouths angular. 



The stem is variable, tapering upward, rather stout, quite as smooth as the 



