SPECIES OF PAXILLUS. 33 
times ochraceous-brown, flesh yellowish ; lamellae wholly connected 
by numerous narrow transverse branches, causing the hymenium to 
consist of large angular pores, decurrent, bright-yellow ; stem short, 
hard, eccentric or lateral, generally reticulated above, colored like 
the pileus ; spores elliptical, uninucleate, .00035 to .00045 in. long, 
.00024 to .00032 in. broad. 
Plant 1 to 2 in. high, pileus 2 to 4 in. broad, stem 3 to 6 lines 
thick. 
Ground in woods and open places. Sandlake, Oneida, Brewerton 
and Catskill mountains. August. 
A singular species remarkable for its boletoid or porous hyme- 
nium. It is thus far peculiar to this country. Its spores, according 
to Prof. A. P. Morgan, are bright-yellow. They are larger than in 
any of our other species of Paxillus. The author of the species 
makes the remark that ‘‘ without examining the fructification it 
might be taken for a Goletus.” It is admitted that the spores are 
broader in proportion to their length than are the spores of most 
Boleti, but in Boletus strobilaceus the spores make quite as wide a 
departure from the ordinary form. In fresh specimens the radiating 
lamellz are distinguishable, being somewhat broader than the con- 
necting veins or branches, but in the dried specimens this difference 
is so obscured that the hymenium appears in no manner to differ 
from that of some of the large and angular-pored Boleti. Indeed 
this same kind of union of radiating lamelle is discernible in the 
hymenium of Soletus paluster in which the spores approach much 
more closely to the ordinary form of Boletus spores ; from which it 
may be inferred that if the species just described is a genuine 
Paxillus, the distinction between that genus and the genus Boletus 
is very slight indeed, consisting in this case merely in the eccentric 
or lateral stem. 
The stem in P. porosus is most often lateral, and at the point of 
its insertion there is generally an excavation in the margin of the 
pileus which gives to it a somewhat reniform outline. The pileus 
has been described as ‘‘ viscid when moist,” but I have never ob- 
served this character in our plant. The color of the hymenium in 
the fresh plant is a bright chrome-yellow. The fresh plant some- 
times emits a disagreeable, dirt-like odor. 
Paxillus strigosus Pk. does not have the lamelle branched or 
erisped at the base, and it has been omitted. It probably belongs 
rather to Inocybe. 
