THE TUBE-BEARING FUNGI 



407 



Figure 336. Polyporus arcularius. Two-thirds natural size, showing dark brown and depressed 

 center; also dark brown stems. 



Polyporus elegans. Fr. 



The pileus is fleshy, soon becoming woody ; expanded, even, smooth, pallid. 



Pores are plane, minute, nearly round, pallid, yellowish-white. 



The stem is eccentric, even, smooth, pallid ; base from the first abruptly black. 

 This is quite common on rotten wood in the forests. It resembles P. picipes 

 both in appearance and habitat. 



Polyporus uicdulla-pauis. Fr. 



Effused, determinate, subundulate, firm, smooth, white, circumference naked, 

 submarginate, wholly composed of middle sized, rather long, entire pores, the 

 whole becoming yellowish in age. 



I found this species on an elm log along Ralston's Run. 



Polyporus albellus. Pk. 



The pileus is thick, sessile, convex or subungulate, subsolitary, two to four 

 inches broad, one to one and a half thick, fleshy, rather soft ; the adnate cuticle 

 rather thin, smooth or sometimes slightly roughened by a slight strigose tomentum, 

 especially toward the margin; whitish, tinged more or less with fuscus ; flesh pure 

 white, odor acidulous. 



The pores are nearly plane, minute, subrotund, about two lines long; white, 

 inclining to yellowish, the dissepiments thin, acute. 



The spores are minute, cylindrical, curved, white, .00016 to .0002 inch long. 

 Peck. 



This species is quite common here and is very widely distributed in the 

 United States. 



