﻿The Mycologic Flora of the Miami Valley, Ohio. 105 



acute. Pores minute, indistinctly stratified, tawny-ferruginous, the 

 mouths rhubarb color. 



On decayed spots of the trunks and branches of the living trees 

 of the common locust (Robinia) ; common. Pileus from 3 or 4 

 inches to a foot in diameter, and 2 inches or more in thick- 

 ness. The annual increments are distinguished by the deep 

 concentric furrows on the upper surface, rather than by dis- 

 tinct strata of pores ; the marginal band is of the same rhu- 

 barb color as the pores, while the older bands become cracked 

 and brown or blackish. This is a most elegant Polyporus ; the 

 species was founded on specimens from New Holland, and it has 

 been found in South Africa. How far eastward it extends, I am 

 unable to say, but should judge that it ranged with the Robinia. 

 I am disposed to think it is the P. igniarius of Schweinitz, N. A. 

 Fungi. For the identification of the species I am indebted to Dr. 

 M. C. Cooke, of London. 



44. P. salicinus, Fr. Pileus woody, very hard, undulate, glabrous, 

 the largest part resupinate ; the margin short, obtuse, spreading, 

 cinnamon, then canescent. Pores minute, round, ferruginous-cin- 

 namon. 



Growing commonly on old logs of the American Ash ; often 

 many feet in extent, with the narrow upper margin seldom more 

 than an inch in thickness, and soon becoming brown and blackish. 

 The fresh pores exhibit an elegant satiny luster when turned in the 

 light. 



45. P. supinus, Fr. Pileus woody, hard, effuso-reflexed, pallid ; 

 the margin obtuse ; the substance within ferruginous. Pores mi- 

 nute, round, obtuse, cinereous-brown. 



On the branches of an old Peach tree. Pileus roundish and 

 mostly effused, an inch or two in diameter, or confluent for several 

 inches on the under side of a branch, half an inch in thickness ; the 

 older portions turning blackish. A fine gray tomentum over- 

 spreads the surface and the pores, while the context beneath is 

 ferruginous or brownish. 



b. Context White. 



46. P. fraxinophilus, Peck. Pileus subungulate, corky, woody, 

 hard, concentrically sulcate and rimose ; the margin obtuse, white ; 



