112 THE CHICAGO ACADEMY OF SCIENCES 



About the roots of decaying pine stumps. Millers. Local. 

 Pores quickly changing to brownish when bruised. Pilei of our 

 plants 10 to 20 cm. broad, many of them distorted. P. his- 

 pidoides Pk. and P. tabulaeformis Berk, are synonyms, according 

 to the authors of these species. It is Romelia sistotremoides 

 (Alb. & Schw.) Murrill, Bull.Torr. C1.31: 339, and Phaeolus sisto- 

 tremoides (Alb. & Schw.) Murrill, N. A. FL9:90. 

 Polyporus poripes Fr. 



Pileus fleshy-pliant, sinuate-repand, glabrous, cinereous-fus- 

 cous. 



Stipe central or eccentric, somewhat firm, glabrous, punctate 

 from the decurrent pores. Pores medium size, short, acute, 

 white. 



Pileus azonate, 3.5 to 7 cm. broad; stipes 2.5 to 4 cm. long, 

 6 mm. thick. 



Growing >on the ground in woods. Glencoe. August. Harper. 

 P. flavovirens B. and Rav. is said to be based upon an older form 

 of this species. 

 Polyporus arcularius Batsch. 



Pileus coriaceous, tough, convex, subumbilicate, azonate, 

 brown-scaly at first, then glabrous, yellowish, the margin strigose ; 

 context white. 



Stem short, slightly squamulose, brownish. Pores oblong or 

 rhomboidal, thin, rather large, the mouths entire, whitish be- 

 coming yellowish or brownish when dry. 



On dead wood, sticks, etc. Frequent during summer. Pileus 

 2 to 5 cm. broad; stipe 2 cm. or less in length. Very common on 

 railroad ties. Pepoon. 

 Polyporus brumalis Pers. (Plate XII, Fig. 1.) 



Pileus fleshy-pliant then coriaceous, somewhat umbilicate, 

 zoneless, in the first year villous, fuliginous, in the second squamu- 

 lose becoming smooth, becoming pale; context white. 



Stem hirsute-squamulose ; pores oblong, mouths circular or 

 angular, toothed, white, at length becoming yellow. The margin 

 of the pileus is somewhat fimbriate-ciliate. 



Pileus 2.5 to 10 cm. broad; stem 2.5 to 5 cm. long, 4 to 8 mm. 

 thick. Spores oblong, slightly curved, hyaline, 6 x 2 /x. 



On fallen logs and branches in open woods. Frequent. P. 

 luridus B. & C. is a darker autumnal form. 

 Polyporus picipes Fr. (Plate XII, Fig. 2.) 



Pileus fleshy, coriaceous then rigid, tough, even, glabrous, 

 depressed on the disk or behind. 



Stipe eccentric and lateral, equal, firm, at first velvety, then 

 naked and punctate, black; pores decurrent, round, small, white, 

 then reddish-yellow. 



Pileus very thin but tough, 7 to 15 cm. broad, often lobed, 

 the color varying from pale to chestnut, especially on the de- 

 pressed disk. 



