THE TUBE-BEARING FUNGI 



379 



Boletus castaneus. 

 Bull. 



The Chestnut Boletus. 

 Edibee. 



Castaneus, pertaining to 

 a chestnut. The pileus is 

 dry, convex, then expand- 

 ed, minutely velvety ; cin- 

 namon or reddish-brown, 

 from one to three inches 

 in diameter; the flesh white, 

 not changing when bruised, 

 cap frequently turned up- 

 ward. 



The tube-surface is white, 

 becoming yellow, tubes small 

 and short, free from the 

 stem. 



The stem is equal or 

 tapering upward, colored and 

 clothed like the cap, short 

 and not always straight ; 

 when young it is spongy 

 in the center but becomes 

 hollow with age. The spores 

 are pale-yellow, oval or broad- 

 ly elliptical, which is a 

 feature to distinguish the 

 species. 



I found a number of 

 specimens in James Dunlap's 

 woods, near Chillicothe, Ohio. 

 A great majority seemed 

 to be attacked by the parasitic 

 fungi, Sepedonium chrysso- 

 spermum. 



The caps are very fine 

 eating. Care should be tak- 

 en to use only young 

 specimens. Found in open 

 woods from June to Septem- 

 ber. 



igikk 310. Boletus castaneus. One-half natural size. 



Figure 311. Boletus castaneus. 



