80 BULLETIN OF THE NEW YORK STATE MUSEUM. 
Pileus 2 to 5 in. broad; stem 6 to 16 lines long, 4 to 6 
lines thick. 
Var. opacus (Paxillus porosus Berk. Bull. N. Y. State 
Mus. 2, p. 32). Pileus dry, glabrous or subtomentose, not 
shining, brown or tawny brown; spores brownish-ochra- 
ceous, .00035 to .00045 in. long, .00024 to .00032 broad. 
Damp ground in woods and open places. Ohio, Lea, 
Morgan. North Carolina, Curtes. New England, fost, 
Farlow. Wisconsin, Bundy. New York, Peck. 
This species is remarkable for its lateral or eccentric stem. 
There is often an emargination in the pileus on the side 
of the stem which gives it a reniform shape. In the typi- 
cal form it is described as viscid when moist, and the 
Wisconsin plant is also described as viscid, but in all the 
New York specimens that I have seen it is dry and some- 
times minutely tomentose. I have therefore separated 
these as avariety. The color of the pileus varies from 
yellowish-brown to reddish-brown or umber. A disagree- 
able odor is sometimes present. The tubes are rather short 
and tough and do not easily separate from the hymenophore 
and from each other. In the young plant they are not 
separable. They sometimes become slightly blue where 
wounded. Asin other species they are pale yellow when 
young but become darker or dingy-ochraceous with age. 
The spores have been described as ‘“‘ bright yellow,” but I 
do not find them so in the New York plant. The plant is 
incongruous among the Paxilli by reason of its wholly 
porous hymenium, but in this place it seems to be among its 
true allies. 
BOLETUS Dut. 
Hymenium composed of easily separable tubes, distinct 
and easily separable from the hymenophore. Tubes 
crowded into a porous stratum without a trama, their mouths 
either round or angular pores. Spores normally fusiform, 
rarely oval or subrotund. 
