MYRI ADOPORUS . 1 39 



Group 4. Rersupinatus. No pileus. 

 The species under this head are also called Poria. 



P. inermis. Ellis. 



This is a common yellow-pored Polyporus growing on dry 

 poplar limbs, becoming black. 



Circumference, marginate, adnate. 



P. vulgaris. Fr. 



Wholly composed of firm, dry, crowded, small, round, nearly 

 equal, pores. 



Circumference, broadly effused, thin, closely adnate, 

 even, white. 



Common on old moist boards. 



P. Vaillantii. Vaillant's Polyporus. 



Circumference, white, free, forming fibrous ribs which 



unite into a membrane. 



Pores, slightly rufescent. 



On cordwood and stumps, to hasten the decay. A good friend of the 

 farmer to rid new land of stumps. 



P. incarnatus. 



Whole plant flesh color. Pores small flesh color. Generally 

 on dry hickory limbs. 



Genus XLVIII. MYRIADOPORUS. Pk. 



This new genus was found by Prof. Peck on the cellular 

 structure of several Polyporoid species. They are supposed 

 to be abnormal forms of some polyporus species. 



