26 NATURAL HISTORY BULLETIN. 



13. Poi.YPORUs EPiLEUCus Frtes. 



Pileus dimidiate, semi-circular, concave below, at first 

 cheesy-soft, later firm, but not fibrous within, shaggy-rough, 

 whitish, subzonate; pores small, round, entire, whitish. 



Not uncommon on birch and willow, not likely to be mis- 

 taken for any other species; when fresh soft, rather echinate 

 above, when dry very hard and heavy like dry putty. 



14. POEYPORUS TEPHRILEUCUS FriCS. 



Pileus fleshy-cheesy, triquetrous, obtuse, villous, unequal, 

 grev, within white, zonate; pores round, elongate, obtuse, 

 •entire, white. 



Distinguished by its rough, grey, upper surface and its 

 snow-white hymenium and context. The pores are longer 

 than in any other of our white-pored species, one cm at the 

 maximum. Not uncommon on rotten logs in marsh}^ places, 

 where it sometimes extends many centimeters. 



15. PoLYPORUS ENDOCROCiNus BcrkcIcy . 



Pileus thick, fleshy-fibrous, rough-bristly brown, the con- 

 text rich yellow; stipe short or none; hymenium golden brown, 

 the pores medium sized thin and lacerate. 



This is our most gaudy, showy Polypore. When fresh and 

 growing the surface is richly tinted in various shades of red- 

 dish brown and yellow, the hymenium also shaded from 

 yellow to brown. Specimens attain 12 cm in length and an 

 equal breadth and are 6 cm thick. The whole mass is spongy, 

 water}', shrinks one-half in drying when also the colors 

 change. In dry sections the context is suffused with red, the 

 tubules darken and there are indistinct zonations. There is 

 no stipe; the form is ungulate-dimidiate. On old oak logs, 

 not very uncommon. 



B. Pilci imbricate, developed from one side of a common 

 amorphic tubercle : at first soft cheesy, then dry and fragile. 



16. PoLYPORUS ciNCiNNATUs Morgan. 



Consisting of numerous cespitose-connate, imbricate, more 

 or less stipitate pileoli. Pileoli very broad, reniform, undulate 



