19141 
OVERHOLTS—THE POLYPORACEJE OF OHIO 87 
6. Pileoli regular in outline and centrally attached; the branches of the stipe 
regular and cylindrical in іопп....................... 38. P. umbellatus 
6. Pileoli always laterally attached; the stipe branches irregular. 39. P. frondosus 
7. Spores roughly echinulate ................................. 41. P. Berkeleyi 
7. Bposes поо... e e rrr ее, КИРЕК ЛЕУ 8 
8. Pileus pallid or light brown; hymenium usually turning black where 
bruised and on drying. ............. eee E 40. P. giganteus 
8. Pileus yellowish green; hymenium not turning black....... 37. P. flavovirens 
9. Context soft and spongy above, firm next to the hymenium; plantsoften much 
distorted; usually growing about вішарв..................... 28. P. distortus 
9. Context uniform; plants not Фініютіеі.................................. 10 
10. Plants growing on the ртоппа.................................... 11 
10. Plants growing on Уоойб......................................... 12 
11. Stipe black and rooting at the base; pileus some shade of brown. .36. P. radicatus 
11. Stipe not black and rooting at the base; pileus yellowish green. .37. P. flavovirens 
12. Sporophore more or less globose; tubes concealed by a volva. .27. P. volvatus 
12. Sporophore not globose; volva аБвепб............................. 13 
13. Sporophore arising from а cup-shaped, sterile body that sometimes disap- 
pears; pileus white; found only on dead branches of Ulmus....... 6. P. conchifer 
13. Sporophore not arising from a cup-shaped sterile һоду.................. 14 
14. Margin of the pileus projecting 5 mm. or more beyond the hymenium; 
hymenium separating smoothly from the context in fresh specimens; 
growing only on Вейшіа................................ 26. P. betulinus 
16. зканиеағазете......................%..........%%......- 15 
15. Hymenium bright віірімш-уеПоУ......................... 42. P. sulphureus 
15. Hymenium not bright вшШрһиг-уеПот................... ees 16 
16. Mouths of the tubes minute, averaging 4-7 to а тап................. 17 
16. Mouths of the tubes larger, averaging 1-3 to a mm..... ......... 18 
17. Mouths of the tubes averaging 4 to a mm.; pileus rarely more than 5 cm. in 
diameter........... on ces eee 5-2... 35. P. elegans 
17. Mouths of the tubes averaging about 6 to a mm.; pileus 4-20 cm. in diameter 
84. P. picipes 
18. Pileus large, more than 5 mm. thick; plant growing on living trees; stipe 
black at the bae. Е. Ao eere errore 33. P. squamosus 
18. Pileus small or medium sized, not more than 5 mm. thick; stipe not 
black at the baee. ... сквер. › соло bean se VE v 19 
19. Tubes long-decurrent on the stipe; context soft and friable when dry 
32. P. pennsylvanicus 
19. Tubes slightly or not at all decurrent; context not soft and friable when dry.. 20 
20. Pileus yellowish brown; mouths of the tubes almost 1 mm. in diameter; 
(0 7* ое o 03 ee 31. P. arcularius 
20. Pileus darker than above, sometimes sooty-black; mouths of the tubes 
averaging 2 to a mm.; walls at first thick............... 30. P. brumalis 
21. Pileus red-varnished, at least when уошар............................. 22 
31. Pilous Po Se eee See 23 
22. Varnish disappearing with age, the pileus then whitish or yellowish. ..... 
61. P. Curtisii 
22. Varnish persistent, the pileus not changing color............ 60. P. lucidus 
23. Sporophore more or less globose; tubes concealed by a volva....... 27. P. volvatus 
23. Sporophore not globose; volva абвепі................................. 24 
