The Mycologic Flora of the Miami Valley, Ohio. 107 



In woods on old Maple logs ; not common. The pilei are often 

 effused to the extent of several feet, with a narrow irregular margin 

 of half an inch or more. Greenish-yellow, olivaceous, and some- 

 times purplish tints are variously blended ; and these likewise affect 

 the substance and the pores. 



50. P. gilvus, Schw. Pileus corky, woody, hard, effuso-reflexed, 

 imbricate and concrescent, subtomentose, then scabrous and un- 

 even, reddish yellow, then subferruginous, the margin acute. Pores 

 minute, round, entire, brownish-ferruginous. 



In woods on fallen trunks and branches ; very common. Pileus 

 2 — 3 inches in breadth, and projecting i — 1 1^ inches. The pileus is 

 fir.st thin, of a bright reddish yellow, and velvety or subtomentose ; 

 afterward the form and surface is various. The pileus may remain 

 thin, or it may become excessively thickened and subungulate ; the 

 surface soon becomes scabrous, and sometimes it is furnished with 

 warty granules ; it is often very uneven or scrupose. Specimens 

 occur that are distinctly zonate. The reddish yellow of the grow- 

 ing margin soon changes to ferruginous, and very old specimens 

 have assumed a canescence. 



I am of the opinion that P. gilvus, Schw., P. isidioides, Berk., 

 and P. scruposiis, Fr. , all pertain to the same species, and I am un- 

 able to separate them even as varieties ; 1 think they are based on 

 differences in the form and age of the specimens. I do not think 

 it is ever " fleshy-tough " as appears to be assumed by Fries in the 

 Epicrisis. 



C. INODERMEI. Pileus from the first dry and firm, the 

 cuticle thin and fibrous. 



VII. Stuposi. Pileus corky or coriaceous, azonate or the zones 



not differently colored, glabrate or appressed villous ; the context 



fibrous or floccose. 



'a. Context Colored. 



51. P. radiatus, Sow. Pileus corky, coriaceous, rigid, radiately 

 wrinkled ; at first velvety, tawny; afterward glabrate, ferruginous- 

 brown ; the margin spreading, repand. Pores minute, pallid, 

 silvery-shining, at length ferruginous. 



On decayed trunks; rare. Pileus i — 2 inches in breadth, very 

 much imbricated and concrescent, always corky; the margin repand, 

 radiate-rugose and subzonate. 



