120 THE CHICAGO ACADEMY OF SCIENCES 



5. Pores minute, golden yellow P. pulchella. 



5. Pores minute, brown, mouths cinereous. . . .P. spissa. 



5. Pores medium size, tawny then cinnamon . .P. ferruginosa. 



5. Pores rather large, cinnamon P. contigua. 



Poria interna Schw. 



Longitudinally penetrating cavities in rotten trunks, very 

 flexuous, wholly white, becoming pale, at first soft, thick, the 

 margin at length inflexed, the tubules often oblique and longer, 

 pores flexuous, minute. 



Inside a hollow stump of Quercus. Millers, Indiana. June. 



Poria mollusca Fr. 



Effused, thin, soft, white, the border byssine, fibrillose- 

 radiating. 



Pores in the center, or collected here and there, small, thin, 

 round, unequal, lacerate, becoming pallid. 



On a charred, decaying log of Pinus Strobus, Millers, Ind- 

 June, 1903. Extensively effused, covering nearly all of the under- 

 side of the log. The specimen was sent to Professor Burt, and 

 referred by him as above. It does not agree well with Fries' 

 description, the pores being large and irregular, with rather thick 

 dissepiments. The plant was of a bright lemon-yellow color 

 when collected, but soon faded to pallid. 



Poria fimbripora Schw. 



Subtriangular, fleshy, moist, spongy. Pileus glabrous, pallid, 

 when dry rugulose and contracted. 



Pores whitish, round, minute, mouths very much fimbriate- 

 ciliate. 



Under side of decorticated log of Ulmus. River Forest, May. 



Named by Prof. Burt for Harper. Our specimens are wholly 

 resupinate, and have weathered to a dull wood-color. From 

 their appearance it is not easy to believe that they belong to the 

 pileate species described by Schweinitz. 



Poria armeniaca Berk. 



Broadly effused, very thin, membranaceous, suborbicular, 

 confluent, border minutely downy. 



Pores white, then becoming bright buff, shallow, minute, 

 round, often confined to the center, the marginal structure 

 byssoid under a lens. 



On dead branches. Riverside. Determined by Prof. Harper. 

 Poria medulla-panis Fr. 



White, effused, determinate, somewhat undulated, firm, 

 smooth, the naked circumference somewhat marginate; almost 

 wholly formed of the longish, medium-sized, entire pores. Be- 

 coming yellowish when old. 



Near Chicago. Harper. According to Prof. Harper, Poria 

 pulchella Schw., is probably a form of this species. 



