136 THE CHICAGO ACADEMY OF SCIENCES 



Hymenium radiate-rugose, glabrous; spores cylindric-ellipsoid, 

 10 x 5 p. 



River Forest and Bowmanville. Harper. A resupinate form 

 occurs. 



Stereum spadiceum Fr. 



Coriaceous. Pilei eff used-re flexed, villous, subfcrruginous; 

 the margin rather obtuse, white. 



Hymenium even, smooth, brownish, when fresh bleeding if 

 bruised. 



On oak stumps, Glen Ellyn. Pilei about 2.5 cm. in length and 

 breadth, usually imbricated and confluent. 



Stereum Curtisii Perk. 



At first orbicular, ferruginous, with a paler somewhat byssoid 

 margin, then effused; edge sometimes free on either side. 



Hymenium rugose, finely velvety; spores ellipsoid, 5x3 to 4 fx. 

 On fallen branches of Quercus. Not rare. 



Stereum acerinum Fr. 



Crustaceous, adnate, smooth, glabrous, white; spores ellipsoid, 

 6 \ 3 to 4 /jl. Forming a thin white crust, generally sterile, surface 

 usually covered with minute particles of lime. 



On bark of living Juniperus virginiana, woods, Millers, Indiana. 

 June. Harper. 



Stereum frustulosum Fr. 



Woody, resupinate, tuberculose, crowded as if confluent, then 

 appearing broken into small pieces; border obsoletely marginate; 

 around the edge and underneath dark brown or blackish. 



» Hymenium convex, cinnamon becoming pallid, pruinose; 

 spores ellipsoid, subacute at both ends, 4 to 5 x 3 to 3.5 /*. 



On oak logs. River Forest. Harper. Also on the cut ends 

 ofjogs, Millers, Indiana. 



HYMENOCHAETE. 



Pileus coriaceous, membranaceous, form various. Hymenium 

 beset with very minute, rigid, persistent bristles. Spores white 

 or olivaceous. 



1 . Plants effused-reflexed 2 



] . Plants resupinate //. cervina. 



2. Pileus and hymenium cinnamon H. dnnamomea. 



2. Pileus fuscous-ferruginous, hymenium 



ochraceous-cinnamon H. ferruginea. 



Hymenochaete cervina Perk. & Curt. 



Wholly resupinate, effused, thin, margin tomentose, soon 

 obliterated. 



Hymenium cervine. Setae pallid, clavate, 40 to 50 x 15 to 

 16 /*. Spores ellipsoid, 5 x 4 /x. 



Near Chicago. Harper. 



