19141 
OVERHOLTS—THE POLYPORACEJE OF OHIO 85 
region and in the Ohio valley as well. It is with this idea in 
mind that the paper has been prepared. 
KEY TO THE GENERA. 
Sporophore entirely resupinate; pileus попе..................... Poria: 
Sporophore sessile or stipitate, sometimes effused-reflexed but not nor- 
mally entirely. meupinsie . —...... ere oorr trea 1 
1. Hymenium composed of concentric lamelle; pileus stipitate..Cyclomyces р. 147 
1. Hymenium not composed of concentric lamellz; pileus sessile or stipitate . . . 2 
2. Hymenium not distinctly poroid, the pores reduced to shallow pits sep- 
arated by narrow ridges or reticulations................. Merulius p. 150 
2. Hymenium distinctly poroid, irpiciform, dedaloid or lamellate, but not 
рімей.....................:............2..... hs sd Е 3 
3. Hymenium more or less waxy or gelatinous, the layers of tubes separating 
smoothly from the context in fresh specimens or when moistened; 
pileus sessile, thin and НехіМе............................ Gleoporus p. 149 
3. Hymenium not at all waxy or gelatinous and not separating smoothly 
from the context; pileus sessile or зіїріќафе............................ E 
4. Hymenium either dedaloid, labyrinthiform or lamellate, at least in part 5 
4. Hymenium poroid or sometimes broken up into teeth.............. 9 
5 КЕК, 2.,22...................-ь.....2 5505 6 
$. ОЕ... со ооо ПУРЕН 524. 8 
6. Pileus minutely velvety to glabrous; context more than 1 mm. thick 
Е Dedalea p. 143 
6. Pileus hirsute to villous; context 1 mm. ог less thick............... 7 
7. Hymenium lamellate, at least in рагі......................... Lenzites p. 145 
7. Hymenium dedaloid but never lamellate ..................... Dedalea p. 143 
8. Plants woody and perennial, more than 1 cm. thick; hymenium not at 
all lameliate ......5 2] oo nb. Trametes p. 138 
8. Plants coriaceous or corky, less than 1 cm. thick; hymenium often 
lamellate :.......:5 221—088 ЕКТІ ziles p. 145 
9. Hymenium broken up into 4біі...,............4................... 10 
9. Hymenium poroid, not broken up into teeth. ......................... 13 
10. Tubes or teeth 5 mm. or more оп ........................ Irpex p. 151 
10. Tubes or teeth less than 5mm. Іопр.............................. 11 
11. Hymenium labyrinthiform at first and remaining so at the margin 
Dedalea p. 143 
11. Hymenium never labyrinthiform............. еее cence eeeee 12 
12. Pileus less than 1 cm. broad; fungus mostly resupinate...... ]трех p. 151 
12. Pileus more than 1 cm. broad; fungus not mostly resupinate 
Polyporus p. 86 
13. Pores large and hexagonal; stipe ргевепі............................ 14 
13. Pores small and circular or angular; stipe present or absent.............. 15 
14. Stipe lateral, often rudimentary; pores usually radiating and longer in 
the >мпариктеснда e. р erum ete Favolus p. 148 
14. Stipe usually central or subcentral; pores not radiating....Polyporus p. 86 
15. Tubes in a single layer; plants аппая!............................... 16 
15. Tubes in two to several layers; plants perennial ...................... 17 
1See Introduction p. 82. 
