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Cincinnati Society of Natural History. 



On old logs ; rare. My specimens so referred are 3 — 5 inches in 

 width and project about an inch. But it is said to be extremely 

 variable in form, being often wholly resupinate. The P. hybridus, 

 Sow., or "dry rot" of ships built of British oak, is thought to 

 be but a form of this species. 



II. Lenti. Pileus fleshy, tough, soft, elastic, villous-tomentose; 

 pores colored. 



28. P. nidulans, Fr. Pileus fleshy, very soft, subpulvinate, 

 villous, then smooth, azonate, reddish-gray, of the same color 

 within. Pores long, medium, unequal, angular, tawny-reddish. 



On fallen trunks and branches, especially of hickory. Pileus 

 1 y 2 — 3 inches in breadth. Readily distinguished by its peculiar 

 softness and color. 



29. P. fumosits, Pers. Pileus fleshy, corky, firm, azonate, silky, 

 becoming glabrous, sooty-pallid, dilated-adnate behind; within, 

 fibrous and subzonate. Pores minute, short, round, entire, whitish- 

 smoky, darker when rubbed. 



On stumps, near the ground, especially of willow. Casspitose 

 and imbricated, the pileus attaining a breadth of 3-4 inches, the 

 smoky tint more or less prevalent, larger and smoother than the 

 next. 



30. P. adustus, Willd. Pileus fleshy-tough, thin, villous, ciner- 

 eous-pallid, effuso-reflexed behind. Pores minute, short, round, 

 obtuse, whitish, pruinose, soon cinereous-brown, the marginal ones 

 obsolete. 



This is one of the commonest of Polypori, and is found on 

 trunks of every kind. The typical form, villous, and with the mar- 

 gin straight, is seldom met with ; a form velvety, isabelline in color, 

 thin and coriaceous when dry, like P. isabellinus, Schw. , is com- 

 mon ; the pileus is sometimes subzonate toward the margin ; it 

 occurs with the margin undulate, rugulose and even crisp ; but in 

 all the forms, the minute burnt brown pores prevail. P. fumoso- 

 griseus, C. & E. , is a resupinate form of this species growing on 

 butternut. 



31. P. didirous, Fr. Pileus fleshy-tough, thin, soft, effuso- 

 reflexed, even, silky, white. Pores short, minute, round, obtuse, 

 brown-cinnamon. 



