THE THELEPHORACEM 457 



Stereum rugosum. Fr, 



Rugosum means full of wrinkles. 



Broadly effused, sometimes shortly rerlexed; coriaceous, at length thick and 

 rigid ; pileus at length smooth, brownish. 



The hymenium is a pale grayish-yellow, changing slightly to a red when 

 bruised, pruinose. The spores are cylindrico-elliptical, straight, 11-12X4-5/A. 

 Massee. 



This is quite variable in form, and agrees with S. sanguinolentum in becoming 

 red when bruised; but it is thicker and more rigid in substance, its pores are 

 straighter and larger. 



Stereum purpureiim. Pers. 



Purpureum means purple, from the color of the plant. 



Coriaceous but pliant, effuso-reflexed, more or less imbricated, tomentose, 

 zoned, whitish or pallid. 



The hymenium is naked, smooth, even ; in color a pale clear purple, becoming 

 dingy ochraceous, with only a tinge of purple, when dry. The spores are elliptical, 

 7-8x4^1. 



I found the plant to be very abundant in December and January, in 1906-7, on 

 soft wood corded up at the paper mill in Chillicothe, the weather being mild and 

 damp. 



Stereum compactum. 



Broadly effused, coriaceous, often imbricated and often laterally joined, pileus 

 thin, zoned, finely strigose, the zones grayish-white and cinnamon-brown. 

 The hymenium is smooth, cream-white. 

 This species is found on decayed limbs and trunks of trees. 



Hymenochcete. Lev. 



Hymenochaete is from two Greek words, hymen, a membrane; chcete, a bristle. 



In this genus the cap or pileus may be attached to the host by a central stem, 

 or at one side, but most frequently upon its back. The genus is known by the 

 velvety or bristly appearance of the fruiting surface, due to smooth, projecting, 

 thick-walled cells. I have found several species but have only been sure of three. 



