the: journal 



OK THE 



Cincinnati Society of Natural History. 



VOL. IX. CINCINNATI, APRIL, 1886. No. i. 



(The following article, read by title at the December meeting 

 of the Society, was omitted from the January number of the Journal 

 for lack of space.) 



THE MYCOLOGIC FLORA OF THE MIAMI VALLEY. 

 By a. p. Morgan. 



[Polyporp:!. — Concluded.] 



Genus III. TRAMETES, Fr. 



Pores subrotund, obtuse, entire, often unequal in depth, sunk 

 into the substance of the pileus ; the trama, hence, contiguous and 

 similar with the substance of the pileus. 



Fungi lignatile. 



a. Pores small or minute. ' 



I. T. scuTELLATA, Schw. Pileus corky, dimidiate and sub- 

 ungulate, or more commonly suborbicular, and attached by the 

 apex, white then brown and blackish. Hymenium concave, white- 

 pulverulent, with a somewhat elevated sterile margin ; pores long, 

 punctiform, with very thick obtuse dissepiments. 



On stumps and old dry trunks, the scutellate form especially 

 on the underside of rails in fences ; common. Scarcely exceeding 

 an inch in breadth, and usually about half an inch. The dimidiate 

 pileus becomes rugged and uneven, and changes to brown and 

 blackish, retaining, however, the white margin ; sometimes con- 

 centric furrows and folds are found upon it. There are all stages 

 between the dmiidiate and the scutellate forms. The pores aver- 

 age about .22 mm m diameter, but the dissepiments, which are 

 always included in the average, are as broad as the pores. This is 

 the T. Ohiensis, Berk. 



