Par? 1, 1907] POLYPORACEAE 
Surface minutely pubescent or tomentose between the 
zones ; plants usually much larger. 
Hymenium white or yellowish. 
Tubes small, 5 toamm., perfectly regular andentire. 3. 
Tubes twice as large, often irregular from splitting ; 
glabrous zones late in appearing and sometimes 
absent. 4. 
Hymenium umbrinous or fuscous. 
Hymenium umbrinous ; surface opaque, with very 
few zones. Sy 
Hymenium fuscous; surface shining, multizonate. 6. 
Pileus not marked with glabrous zones, but nearly uniform in 
color and rarely shining. 
Sporophore semiresupinate, narrowly reflexed. 
Tubes 1 cm. or more in length. 7. 
Tubes only a few millimeters long. 
Tubes jarge, hexagonal, 1 mm. broad. 8. 
Tubes minute, circular to angular, 5-7 to a mm. 9. 
Sporophore normally pileate, sometimes decurrent. 
Surface entirely devoid of zones or concentric furrows. 
Surface somewhat zonate or concentrically furrowed. 
Margin broadly sterile, the sterile zone about 2 mm. 
broad, 11 
Margin fertile or narrowly sterile. 
Surface milk-white, concentrically furrowed. 12 
Surface avellaneous, with isabelline zones. 13 
Pileus entirely glabrous at maturity. 
Surface brown or blackish, multizonate. 
Pileus marked with brown and black zones; temperate 
species. 
Pileus marked with brown and tawny zones ; tropical species. 15. 
Surface white to isabelline, sometimes with darker spots or 
lines, but light-colored in general appearance. 
Hymenium lilac-colored, often faded in herbarium specimens. 16. 
Hymenium white or yellowish, sometimes discolored. 
Margin of pileus entire or lobed, not becoming fimbriate 
or lacerate at maturity. 
Pileus extremely thin, less than 1 mm., very flexible. 17. 
Pileus not as above. 
Surface and tubes milk-white throughout, even in 
dried specimens. 
Surface white or yellowish, rarely tinged with bay 
behind; tubes becoming yellowish or tawny. 
Context punky, 2-3 mm. thick; tubes 6 toa mm. 19. 
Context fibrous, 1mm. thick ; tubes 7-8 toamm. 20. 
Context fleshy-tongh, 1-3 mm, thick; tubes 4-5 
toamm.; pileus almost brittle when dry. 21. 
Surface isabelline or pale-fulvous, multizonate, the 
zones ustially pale-latericeous. 
Surface rough, scabrous. 22. 
Surface very smooth and glabrous. 
Surface isabelline-fulvous throughout; hy- 
menium becoming fulvous. 23. 
Surface isabelline in front with pale-lateri- 
ceous zones, latericeous behind ; hymenium 
becoming pale-isabelline. 
Margin of pileus very thin, becoming fimbriate or lacerate 
at maturity. 
Tubes large, 2-3 toa mm., margin fimbriate. 25. 
Tubes only half as large, margin lacerate. 26. 
Surface of pileus clothed entirely with a conspicuous hairy covering. 
Pileus 0.5 cm. or more in thickness and several centimeters broad. 
Surface roughly hirsute. 27, 
Surface finely hirtose-tomentose. 
Pileus much thinner. 
Hymenium becoming wholly or partly fuscous ; tubes broad and 
very shallow. . 
Surface latericeous-fulvous, except near the margin. 
Surface white to cinereous or isabelline. 
Tubes regular in shape and size ; plants tropical. 
Tubes irregular both in size and shape; plants confined 
to the southern United States. 
Hymenium not becoming fuscous. 
Hymenium lilac-colored ; plant minute. 
Hymenium white or slightly discolored. . 
Surface more or less purple, marked with a few concen- 
tric lines. . . 
Surface white to cinereous, marked with numerous con- 
centric lines. 
29. 
18. 
28. 
30. 
17 
C. eclypus. 
C. pubescens. 
C. alabamensis. 
C. sector. 
C. subluteus. 
C. hexagoniformis. 
C. depauperatus. 
. C, pallidofulvellus. 
. C. limitatus. 
. C, delectans. 
. C. balsameus. 
14. C. planellus. 
C. armenicolor. 
C. brachypus. 
. haedinus, 
. Substipitatus. 
lena 
ochrotinctellus, 
. Lloydit. 
j letodermus. 
concentricus. 
Drummondit. 
. membranaceus. 
C. nigromarginatus. 
C. subchartaceus, 
C. fulvo-umbrinus. 
C. pinsitus. 
31. C. sericeohirsutus. 
32. 
C. sublilacinus. 
33. C. sculatus. 
34. C. pavonius. 
