THE POLYPORACEAE OF WISCONSIN. 59 



Poria subf usco-flavida Rostk. 



Confluent, broadly effuse, thin, leathery, dry, adnate, from white to 

 yellowish-tawny; margin thin, white, thready, determinate; pores mi- 

 nute, irregular. 



On oak wood. 



We have well developed specimens from Stone Lake and Crandon. 

 The Crandon specimens are pronounced by Bresadola to be identical 

 with Fries' type. The spores of the specimens from Stone Lake are less 

 globose. 



Poria pulchella Schw. 



Resupinate-effuse, unequal, sub-plicate, rugose, with determinate 

 margin, outline undulate, nodular, substerile pores minute, regular, 

 angular, tubules somewhat oblique upon the ridges of the surface. 



Found at Madison 011 quite rotten poplar, forming thin expanses of 

 a delicate ashy-gray tinge. 



9. POLYSTICTUS Fries. 



May be known by the coriaceous, membranaceous or sometimes 

 spongy thin pileus, with a thin, loosely fibrous cuticle. The tubes first 

 appear in the center or near the place of attachment and develop to- 

 wards the margin; at first superficial punctiform, then becoming 

 deeper. Never hard, woody nor very thick, nor should the pores ever 

 be stratified. - 



The genus Trametes its nearest relative, may be distinguished from 

 it by the unequal length of the tubes ; Fomes and Polyporus by struc- 

 ture and pore-formation. 



1. MESOPODES. Context and spores ferruginous. 



Polystictus subsericeus Peck. 



Pileus coriaceous, subumbilicate, silky-shining with soft appressed 

 ferruginous radiating fibres; stipe slender concolorous, tomentose; 

 pores small, concolorous, angular. 



This handsome little fungus was first called P. splendens by Peck 

 (22, 33, p. 37) ; as the name was preoccupied, he changed it to P. sub- 



