[Vor. 1 
86 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
16. Tubes not in a distinct stratum but appearing to be sunken to differ- 
ent depths into the context.......................... Trametes p. 188 
16. Tubes forming a well marked stratum entirely distinct from the 
MN есь с весь вова вов зоо во авс Polyporus р. 86 
17. Hymenium bright yellowish brown; plants growing only on the wood 
of coniferous ігевв....................................... Trametes p. 138 
17. Hymenium whitish, flesh-colored, dull brown, etc., but not bright yel- 
lowish brown; plants growing on the wood of either coniferous or decid- 
eene Келл ee ea eee ЕУ Fomes р. 126 
DESCRIPTIONS AND KEYS ТО THE SPECIES 
POLYPORUS Mich. ex Fries, 
Syst. Myc. т: 341. 1821; Mich. Nov. Plant. Gen. 129. 1729. 
Plants annual or in rare cases persisting for two or three 
years, terrestrial or epixylous, sessile or stipitate; pileus fleshy, 
coriaceous or corky in texture, small or of immense size, often 
brightly colored; context white, yellow, red, or brown; tubes in 
a single layer, all sunken into the context to an equal depth so 
that their bases form a definite continuous straight line; mouths 
mostly cireular or angular, in rare cases showing a favoloid or 
daedaloid tendency and sometimes breaking up into teeth; 
stipe (when present) variable in position and texture; spores 
white (bluish in one species), or some shade of brown. 
KEY TO THE SPECIES 
Context white or уі... п.п... Section I 
Context reddish or уеПомінһ..........................222222277.. Section II 
Context brown or brownish...........................--.-0.. Section III, 
Section I, 
Sporophore stipitate ог substipitate. ........... Lilli ile e eee. 1 
Sporophore sessile or sometimes effused-reflexed but never stipitate....... 21 
1. Pileus and stipe covered with a reddish varnish......................... 2 
1. Pileus and stipe not red-varnished..... 2.20.00... аа... 3 
2. Varnish disappearing with age, the pileus then whitish or yellowish 
61. P. Curtisii 
2. Varnish persisting, the pileus not changing color.............. 60. P. lucidus 
3. Plant small, not more than 1 em. high........................... 29. P. pocula 
3. Plant always much larger. ..........LLuuulluulu e LLL 4 
4. Stipe compound, branching near the base; pileoli usually severalormany. 5 
4. Stipe simple or not branching more than once; pileus generally single.... 9 
5. Pileoli small (usually less than 5 ст. broad) and numerous 
5. Pileoli large (5 cm. or more broad) and few in number................... 7 
