106 Cincinnati Society of Natural History. 



context stratose, white, then subfcrruginous. Pores medium, un- 

 equal, nearly round, obtuse, white. 



On living trees of the White Ash ; common. Pileus 3 — 6 inches 

 or more in breadth, and 2 — 3 inches thick. The pileus is commonly 

 more or less irregular or deformed ; it is distinctly stratified within 

 and witliout, both the substance and the pores; the while margin 

 changes to gray or cinereous, and finally to brown and blackish in 

 the succeeding years ; the white pores and substance become isa- 

 bellinc, and at length somewhat ferruginous. The pores are very 

 large for this class of Polypori, averaging as much as .35 mm. in 

 diameter ; they are quite trainetoid in appearance. It grows high 

 up on the living trunk, on spots where branches have broken off. 



47. P. cofuiatus, Fr. Pileus corky,' woody, effuso-reflexed, scalari- 

 imbricate, concrescent, villous, white or cinereous; the context and 

 pores stratose Pores minute, nearly round, white. 



Growing at the base of Maple trees, between the roots, and often 

 covered over by mosses ; common. Pilei 2 — 5 inches in breadth, 

 and often reflexed 2 or 3 inches. Our specimens are scarcely 

 villous, but velvety, and glabratc ; the white changes to an elegant 

 cream color in drying. The dried specimens are light and corky, 

 yet the plant is remarkably persistent, some specimens exhibiting 

 the strata of many years. 



VI. LiGNOSi. Pileus hard and woody, covered by a thin crust, 

 more. or less effused at the base ; perennial, but not stratose. 



48. P. fraxiunis, Bull. Pileus corkw wood)-, glabrous, some- 

 what applanate, whitish, then reddish and brown, at first even, after- 

 ward concentrically sulcate-plicate, pallid within. Pores minute, 

 short, reddish at first, as well as the margin covered with a white 

 sebaceous down. 



( )n trunks of the White A.sh ; rare. Pileus 2 -4 inches in breadth, 

 or confiuently several inches. Solitary or inihricatetl, rugged, sub- 

 zonate, dark red brown ; the margin, substance and pores pale red- 

 dish. Odor strong and penetrating. 



49. P. glojneratus, Peck. Pileus corky, woody, effuso-reflexed, 

 densely imbricate, concre.scent, siibtomentose, dark tawny, ob- 

 scurely zonate. Pores small, angular, greenish yellow, with purple 

 tints, the mouths with a silvery sheen. 



