NATURAL HISTORY SURVEY 121 



N 



Poria subacida Peck. 



Effused, separable, tenacious, flexible, uneven, determinate, 

 the margin downy, narrow, pure white. 



Pores small, subrotund, 2 to 6 mm. long, often oblique, whitish 

 inclining to dingy-yellowish, pale tan-color or dull cream-color, 

 the dissepiments thin, more or less dentate. Odor strong, subacid. 



On a pine log. Millers, Indiana. October, 1903. Harper. 



Poria obducens Pers. 



White, effused, incrusting, innate, firm, wholly formed of 

 very small, crowded, equal, distinctly stratose pores, the annual 

 strata pallid-tan. 



On bark of dead Quercus, woods, Glen Ellyn. August. The 

 growing margin is smooth, definite, not separable from the matrix ; 

 the pores are of medium size, at first shallow, with thick dis- 

 sepiments. In Fungi Col. No. 402, it is suggested that this species 

 is probably only a resupinate form of F. connatus, while Cooke 

 (Grev. 17: 58), considers it a resupinate form of Polyporus salignus. 



The vesicular form of this species (Polyporus induratus Peck. 

 Rep. 31: 37, Myriadoporus induratus Peck, Bull. Torr. Cl. 11: 17), 

 has been found at Winfield, growing on dead sticks. 



Poria attenuata Pk. 



Resupinate, effused, very thin, separable from the matrix, 

 pinkish-ochre, the margin whitish. 



Pores minute, subrotund, with thin acute dissepiments. 



On dead sticks of Quercus. Woods, Kenilworth. May. 

 Xear P. vincta Berk. 

 Poria candidissima Schw. 



Effused ; the mycelium a very thin, bombycine, but separable 

 membrane. 



Pores very large, at length oblique, and with the membrane 

 pure white. 



Effused in large cushion-like areas, covering the greater 

 portion of a hickory stump in woods, Glen Ellyn. November, 

 1902. The plant is very thin and membranous at the margin, 

 increasing in thickness toward the center of each area, where it 

 is 3 to 5 mm. thick. It is soft and fleshy when fresh, pure white 

 in color. When old it takes on a cervine hue, the pores become 

 compressed, angular and more or less labyrinthine. 

 Poria vaporaria Pers. 



Effused, innate, the mycelium creeping in the wood; floccose, 

 white. 



Pores large, angulate, white becoming pallid, crowded together 

 into a contiguous, firm, persistent stratum. 



On rotten wood in moist places in woods. Indeterminately 

 effused, flesh-color, with a border of white mycelial threads which 

 extend some little distance into the matrix. Pores uneven in 

 size; spores subglobose, ochraceous, 4 to o /A. 



