[Vor. 1 
102 ANNALS ОҒ THE MISSOURI BOTANICAL GARDEN 
On old rotting logs, especially of Liriodendron. August to 
December. Not common. 
The writer has collected this plant several times in the Miami 
valley, almost always on logs of Liriodendron tulipifera. The 
plant is usually entirely resupinate and has doubtless been de- 
scribed as a Poria, but good collections were made which showed 
beyond a doubt the pileate tendency of the plant. No dispo- 
sition could be made of the plant until Dr. Murrill suggested that 
it might belong to P. zonalis. Later, specimens were sent to 
Rev. Bresadola who pronounced it that species and an opinion 
recently received from Mr. Lloyd expresses the same view. It 
is, however, quite different from the usual forms of that plant 
and the name is used with some apprehension. The plant 
is also abundant in Missouri where the writer has found the 
pileate forms to be much more common than іп Ohio. P. 
zonalis has been supposed to be confined to the Gulf States in 
this country, although it is not surprising that semi-tropical 
forms found there should extend their range up the large river 
valleys to the north. 
22. P. adustus Willd. ex Fries, Syst. Myc. т: 363. 1821. 
Boletus adustus Willd. Fl. Berol. 392. 1787. 
Plants annual, sessile, effused-reflexed, or resupinate; pileus 
dimidiate, often imbricate, 1-6 x 2-7 x 0.2-0.4 cm., fleshy- 
tough when fresh, coriaceous or rigid when dry, white to cin- 
ereous or pale tan, fibrillose-tomentose to almost glabrous, zonate 
or azonate, the surface usually rough, margin thick and broadly 
sterile below when young, becoming thin when mature; context 
white or pallid, rather soft when fresh, corky or fibrous-corky 
when dry, 1-3.5 mm. thick; tubes not more than 1 mm. long, 
the mouths grayish black to black, angular, even, minute, 
averaging 5-7 to a mm.; spores white, smooth, oblong to oblong- 
ellipsoid, 2-2,5 x 3.8-4.3 y. 
On stumps and trunks of dead deciduous trees. August to 
December. 
This species differs from P. fumosus Pers. ex Fries and P. 
fragrans Peck in the smaller size and the uniformly black 
hymenium. 
