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 Boletus." 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 

 lamellae are distinguishable, beins; 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 lamellae is discernible in the 

 hymenium of Boletus jpaluster 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 lamellae branched or 

 crisped at the base, and it has been omitted. It probably belongs 

 rather to Inocybe. 



