MICHIGAN ACADEMY OF SCIENCE. 
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14. Pileus 3-G cm. wide, white to pale tan, fan-shaped : (15) 
14. Pileus very small, l-lbo cm. broad, yellowish-brown; mostly on Sas- 
safras : Polystictus hirsutulus Seine. 
(Coriolus hirsutulus). 
15. Pileus rigid, tough, thin, margin lobed, attached by a tubercle, sur- 
face scabrous, uneven : Polystictus Lloyclii Murr. 
(Coriolus Lloydii). 
15 Pileus rather flexible, entirely glabrous, margin lobed ; tubes 2-3 mm. 
long : Polystictus concentricus Murr. 
(Coriolus concentricus). 
Polystictus barbatulus=Polystictus sericeohirsutus (on red cedar). 
Polystictus pseudopargamems— Polystictus prolificans. 
Polystictus radiatus=Polyporus radiatus. 
See also Polystictus velutinus Fr. 
Trametes. 
1. Pileus usually very large, 10-20 cm. wide, imbricate, dimidiate, 
smoky chocolate-brown, flesh and pores umber, with a resinous 
luster; common: Trametes benzoina Fr. 
(Ischoderma fuliginosum) . 
1. Pileus much smaller: (2) 
2. Uniform cinnabar-red throughout; pileus thick; common on dry 
wood: Trametes cinnabarinus Fr. 
(P'ycnoporus cinnabarinus) . 
2. Not red: (3) 
3. Tubes splitting Irpex-like in age; pileus thin, zonate, pale brown to 
blackish-brown, 2-8 cm., resupinate-reflexed ; flesh bordered by 
black lines near the tubes: Tremetes mollis Fr. 
(Antrodia mollis). 
3. Tubes not Irpex-like; pileus laterally connate: (4) 
4. Flesh white or whitish, pileus 1-3 % cm. wide: (5) 
4. Flesh brown to ferruginous; tubes large, 1 mm. in diam. ; pileus 
5-12 cm. wide: (7) 
5. Pileus effuso-reflexed : (G) 
5. Pileus ungulate, light-brown, concentrically sulcate in age; tubes 
stratified, chalky-white: Trametes ohiensis Berk. 
See: Fomcs ohiensis Berk. . 
G. Pileus whitish to pale wood-colored, often radiate-furrowed, often 
dimidiate; on dry fence rails and similar situations: 
Trametes sepium Berk. 
(Coriolellus sepium). 
