NATURAL HISTORY SURVEY 131 



Hymenium dentate-porous towards the thick definite margin, 

 centrally nodulose and prolonged into unequal compressed trun- 

 cate or laciniate, rarely terete aculei, whitish, centrally yellowish 

 or pale ferruginous. 



River Forest. Harper. 



RADULUM. 



Plants resupinate; hymenium of irregular, subcylindrical ob- 

 tuse tubercles. Growing on wood, resupinate-effused, often 

 bursting through the bark. 



Plant white, then yellowish, border byssine R. orbiculare. 



Plant pallid, border tomentose, reflexed R. pallidum. 



Radulum orbiculare Fr. 



In autumn, orbicular, confluent, white then yellowish, the 

 border byssine; tubercles elongated, nearly terete, scattered or 

 fasciculate. 



In spring, waxy, glabrous, flesh-color; tubercles shorter and 

 softer. Very variable; 5 to 7.5 cm. broad, quite membranaceous, 

 or above 4 mm. in thickness. 



On dead sticks. River Forest. June. Harper. 

 Radulum pallidum B. and C. 



At first orbicular, then confluent and effused, with a narrow 

 reflexed tomentose margin, pallid. 



Tubercles terete, short, deformed, scattered or sometimes 

 collected in lines or groups. 



On decaying log of Quercus. Glencoe. Harper. 



PHLEBIA. 



Hymenium amphigenous, waxy-soft, smooth, continuous, from 

 the first wrinkled into crests; covered with wrinkles which are 

 crowded, interrupted, persistent, quite entire at the edge, every- 

 where bearing spores. 



Flesh-color or bright red, smooth on both sides ... P. radiata. 

 Flesh-color or livid, villous on the under side. . . .P. merismoides. 



Phlebia radiata Fr. 



Red-flesh-color, somewhat round, equal, smooth on both sides, 

 circumference radiate in the form of teeth. Folds straight, 

 radiating in rows. 



On bark of dead standing trunk of Tilia. Woods, Riverside. 

 October, 1903. Confluent in the fissures of the bark for a distance 

 of many centimeters. The bright cinnabar-colored form, P. 

 cinnabarina Schw., was found on the bark of a log of Quercus at 

 Glencoe, September, 1903. 



Phlebia merismoides Fr. 



Effused, flesh-colored then livid, villous and white on the 

 under side, the border orange, strigose. Wrinkles simple, straight, 

 crowded. 



