BOLETI OF THE UNITED STATES. 79 
time to the margin of the pileus; spores rather minute, 
oblong, ochraceo-ferruginous, .0003 to .0004 in. long, .o0o14 
to .00016 broad. 
ileus) 2) ine broad stem) 2 to 2.5 in. lone, 3 to 4 lines 
thick. 
Thin woods. North and South Carolina, MA. Curtzs. 
Specimens of this species have not been seen by me. 
The authors remark that its affinities are clearly with Bo/e- 
tus flavidus and its allies, from which it is distinguished by 
its large radiating pores. They also say that when dry it is 
scarcely distinguishable from Paxzllus porosus Berk., except 
by its spores. This would imply that its stem is eccentric 
or lateral and I have been informed by Mr. Ravenel that it 
is sometimes so. But specimens of this kind, labeled Bode- 
tus decipiens B. & C., have been received which show by 
their spores that they are Paxzllus porosus. Besides, Prof. 
Farlow informs me that authentic specimens of B. deczpzens 
in the Curtisian Herbarium have only central stems, from 
which things I suspect that the two species have been 
confused. The spore dimensions here given are derived 
from a specimen in the Curtis Herbarium, through the 
kindness of Prof. Farlow. 
Boletinus porosus Px. 
ECCENTRIC-STEMMED BOLETINUS 
Paxillus porosus Berk., Cat. Cinn. Plants, p. 54. Boletus lateralzs Bundy, 
Geol. Wisconsin, Vol. I, p. 398. 
Pileus fleshy, viscid when moist, shining, reddish-brown, 
flesh three to nine lines thick, the margin thin and even; 
hymenium porous, yellow, formed by radiating lamelle a line 
to half a line distant, branching and connected by numerous 
irregular veins of less prominence and forming large angular 
pores ; stem lateral, tough, diffused into the pileus, reticu- 
lated at the top by the decurrent walls of the tubes, colored 
like the pileus ; spores semiovate. 
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