* 486 
Pileus 6 to 12 lines broad; stem 8 to 12 lines long, 2 to 3 lines 
thick. 
“On old grass roots in sandy prairie pasture,’ Rooks County, 
Kansas. July. E. Bartholomew. 
The small size, dark-brown pileus and semitomentose stem are 
the prominent characters in this species. 
COLLYBIA MICROSPORA. 
Pileus thin, convex, subumbonate, glabrous, white; lamellae 
broad, subdistant, nearly plane, white, changing to brown in dry- 
ing; stem slender, hollow, glabrous, white, becoming brown in 
drying; spores minute, broadly elliptical, .ooo16 in. long, .00O012 
broad. 
Pileus about 6 lines broad; stem about I in. long, 1 line thick. 
Wet ground under bushes. Rooks county, Kansas. July. 
Bartholomew. 
This plant, in the dried state, might easily be taken for some 
species of Vaucoria, since the lamellae assume a rusty-brown hue. 
This change of color in the lamellae and stem is a peculiar feature 
of this small species which the notes of the collector record as 
“ pure white throughout.” 
MYCENA CAESIA. 
Pileus submembranous, campanulate, striate, glabrous, grayish- 
brown, blackish or blackish-brown in the center; lamellae thin, 
subventricose, grayish or bluish-gray; stem slender, hollow, glab- 
rous, grayish-brown; spores subelliptical, slightly apiculate at one 
end, .0003 to .0004 in. long, .00016 to .0002 broad. 
_ Pileus 4 to 6 lines broad ;.stem I to 2 in. long,.5 to 1 line thick. 
Among sphagnum. Newfoundland. September. Rev. A. C. 
Waghorne. 
I have seen dried specimens only and am not certain that the 
bluish-gray hue of the lamellae is so conspicuously present in the 
fresh plant. The margin of the pileus is sometimes tinged with 
yellowish-brown. 
HyYGROPHORUS SPHAEROSPORUS. 
Pileus fleshy and thick in the center, subobconic, convex, ob- 
tuse or slightly umbonate, whitish, inclining to reddish-brown, the » 
_ margin incurved, flesh firm, white; lamellae rather broad, subdis- 
_ tant, adnate or slightly decurrent, white; stems tufted, flexuous, 
