130 POYPORBI. 



C. castaneus. Bull. 



Pileus, convex, plane or depressed, firm, even, dry, min- 

 utely velvety tomentose, cinnamon or reddish-brown ; flesh 

 white, unchangeable. 



Tubes, free, short, small, white, becoming yellowish. 



Stem, equal or tapering upwards, even, stuffed or hollow, 

 clothed and colored like the pileus. 



Spores, .0004 to .0005 inch long, .00025 to .0003 inch 

 broad. 



Pileus one and one-fifth to three inches broad. 



This species does not seem to be partial to woods, for you will find it 

 growing under isolated trees along the roadside. Along the road from 

 Trexlertown to Allentown, near a place called Crocksville. 



Genus XLVII. POIvYPORUS. Fr. Hym. 



Hymenophore descending into the trama of the pores, which 

 are not easily, if at all, separable, and changed with them into 

 a distinct substance. 



The trama is different in substance from the hymenophore, 

 and often in color. 



The better to identify the different species they are divided 

 into different sections. 



Section i. Mesopus. Pileus entire, stem central. 



P. flavovirens. B. & Rav. 



Pileus, three to six inches broad, expanded, funnel-form, 

 fleshy ; flesh white, tomentose, yellow, green or olivaceous, 

 rimose when old. 



Pores, medium, toothed, white, decurrent down the white, 

 tapering stem. 



This is quite common in our woods, growing in groups of fifteen to 

 twenty plants under one tree. Dorney's woods near Allentown. 



