54 NORTH AMERICAN FLORA [VoLUME 9 
tinged with wine-color, becoming very blackish and opaque in type specimens; margin 
extremely thin, even or undulate: context tough, fibrous, very thin, discolored in type 
specimens ; tubes extremely short, angular, 8 to a mm., edges thin, entire, white to dis- 
colored, nearly black in type specimens: spores not examined . stipe laterally attached, 
compressed, sometimes wanting, rarely over 2 cm. in length or 5 mm. in breadth, expand+ 
ing into the pileus, which it resembles in surface and substance. 
TYPE LOCALITY: Cuba. 
HaBitaT: Dead wood. 
DISTRIBUTION : Cuba; reported also from Guiana. 
37. POLYPORUS (Micheli) Paulet, Traité Champ. A/. 23. 1812? 
Polyporus Adans. Fam.2: 10; hyponym. 1763. 
Polyporelius Karst. Medd. Soc. Faun. Fl. Fenn. 5: 37. 1879. 
Leucoporus Quél, Ench. Fung. 165. 1886. 
Cerioporus Quél. Ench. Fung. 167. 1886. 
Melanopus Pat. Hymén. Eur. 137. 1887. 
Hymenophore annual, epixylous, small and simple, very rarely large and compound : 
stipe central, excentric or lateral, much reduced at times in a few species, often partly or 
wholly brown or black ; surface usually smooth, the margin at times ciliate: context white 
or yellowish, fibrous, tough to corky; hymenium porose, at times alveolate: spores smooth, 
hyaline. 
Type species, Polyporus Ulmi Paulet. 
Stipe pallid or light-brown, centrally attached, not darker than the pileus. 
Margin of pileus devoid of cilia. 
Pileus beset, especially near the margin, with hydnoid processes. 1. P. hydniceps. 
Pileus ornamented with conspicuous tufts of fibrils, which are larger ; 
and darker toward the center. 2. P. fagicola. 
Pileus plainly villose, tomentose or scabrous, often becoming gla- 
brous with age. 
Pileus scabrous, irregular, umbrinous, margin involute; stipe sca- ‘ 
brous ; tubes small, 4 to amm., dissepiments dentate. 3. P. scabriceps. 
Pileus villose or tomentose. 
Pileus becoming virgate from the rupture of the cuticle; tubes 
2toamm., decurrent, dissepiments dentate. 4. P. virgatus. 
Pileus not becoming virgate. 
Pileus less than 2 cm. in diameter, ochraceous ; tubes 2 to a 
mm., decurrent to the base of the stipe. 5. P. delicatus. 
Pileus more than 2 cm. in diameter. : 
Tubes decurrent, very short, entire; pileus dark-purple, 
ornamented here.and there with paler radiating lines, 
surface finely tomentose, becoming glabrous. 6. P. dibaphus. 
Tubes not decidedly decurrent, denticulate when mature ; 
pileus yellowish to smoky-black, villose, at length gla- 
brous ; spores oblong, curved, 6 X 2xz. 7. PB. Polyporus. 
Pileus minutely tomentose or glabrous from the first. 
Sporophore goblet-shaped ; pileus less than 3 cm. broad, shallowly 
depressed at the center; stipe long, striate, expanding into the 
pileus. . 8. P. Tuba. 
Sporophore trumpet-shaped ; pileus 5-10 cm. broad, deeply infun- 
dibuliform ; stipe 3 cm. long, pallid, puberulent. 9. P. craterellus. 
Sporophore not as above. . 
Pileus minute, 2mm. in diameter, umbilicate, margin involute ; 
pores alveolar. 10. P. Acicula. 
Pileus large, 10 cm. or more in diameter. 
Surface umbrinous; stipe hispid; species tropical. ll. P. discoideus. 
Surface milk-white ; stipe glabrous; species temperate. 12. P. admirabilis. 
Pileus of medium size, 2-5 em. in diameter. : 
Context golden-yellow, not extremely thin; tubes remote 
from the stipe. . 13. P. phaecoxanthus. 
Context whitish or brownish in color. 
Pileus brown, polished ; context light-brown, extremely 
thin; tubes decurrent. | 14. P. columbiensis. 
Pileus white or pallid; context white. 
Stipe central. ; 
Pileus 1 mm. or less thick. 15. P. obolus. 
Pileus 5-10 mm thick. 16. P. albiceps, 
Stipe lateral. .. 17. P. humilis. 
Margin of pileus ornamented with cilia, which often disappear with age. 
Tubes alveolar. 
Margin of pileus finely hispid, broadly sterile below, surface 
ochraceous, radiate-striate ; stipe brown, pulverulent. 18, P. aemulans, 
