490 
and very distinctive character. In the dried specimens the 
lamellae have assumed a dingy grayish-blue hue, inclining to 
brown. 
HyYPHOLOMA CUTIFRACTA 
Pileus thin, campanulate or expanded, sometimes faintly striate 
on the margin, grayish-buff, the disk sometimes darker, the cuticle 
commonly irregularly rimose ; lamellae thin, close, adnate, at first 
white or whitish, then rosy-brown; stem long, slender, hollow, 
glabrous, white; spores elliptical, brown, .0003 in. long, .0002 
broad. 
Pileus I to 2 in. broad; stem 3 to 4 in. long, I to 2 lines thick.. 
About stumps of Lombardy poplar. Kansas. July.  Bar- 
tholomew. 
This species is closely related to H. zncertum, but differs in its 
long slender stem and in its cuticle cracking in an irregular man- 
ner and revealing the thin white flesh beneath. No remains of 
the veil are visible in the dried specimens. Sometimes the mar- 
gin of the pileus is deeply split. 
PSATHYRELLA LEUCOSTIGMA. 
Pileus submembranous, campanulate, striate, bluish-white whem 
fresh, changing to sepia-brown when dried, the apex remaining 
whitish ; lamellae close, lead color when young, becoming black 
with age, whitish on the edge; stem slender, flexuous, hollow, 
white ; spores black, elliptical, .0005 to .0006 in. long, .0003. 
broad. 
Pileus 4 to 6 lines broad; stem 1 to 1.5 in. long, about 1 line: 
thick. 
Wet ground under trees. Kansas. July. Bartholomew. 
This pretty little species is well marked in the dried state by 
the white apical spot on the pileus. The plant is probably hygro- 
phanous in the fresh state. esa 
PSATHYRELLA BARTHOLOMAEI. 
; Pileus thin, subconical or convex, glabrous, striate on the mar- 
gin, pale brown; lamellae close, nearly plane, adnate, brownish 
becoming black; stem slender, flexuous, hollow, adorned with a 
few grayish fibrils, pale brown; spores elliptical, .0004 to .0005 in- 
long, .0002 to .00025 broad. 
Pileus 6 to 12 lines broad; stem 1 to 1.5 in. long, scarcely 
line thick. Re sh 
