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adnate, with a decurrent tooth, whitish or pallid; stem slen- 
der, hollow, paler above and slightly squamulose; spores 
large, variable in size, .0005‘—.00075' long, .0003'’—.0004° 
broad. Plant 1—1.5’ high, pileus 6°—-10* broad, stem scar- 
cely 1“ thick. 
Sandy soil along railroads. Oct. 
, Agaricus (Hypholoma) hymenocephalus Pk. Pileus 
thin, fragile, campanulate then expanded, sometimes um- 
bonate, hygrophanous, brown and striatulate when moist, 
pallid or whitish and radiately rugulose when dry, subato- 
mate, tbe whitish appendiculate veil soon evanescent; lamell® 
narrow, close, dingy then brown; stem slender, brittle, hollow, 
striate and slightly mealy at the top, white; spores brown, 
elliptical, .0003° long, 00016‘ broad. Plant 3’—-4' high, pileus 
1’—2' broad, stem 1*=-1.5“ thick. 
Ground under alders. Aug. 
It belongs to the section Appendiculati, and is remar- 
kable for the fragile character of the pileus and stem. 
Agaricus (Psiloceybe) camptopus Pk. Pileus thin, 
broadly convex, glabrous, hygrophanous, brown and stria- 
tulate when moist, whitish when dry; lamell® narrow, elose, 
whitish becoming brown; stem equal, smooth, generally eur- 
ved, slightly pruinose or mealy at the top, with a withe 
strigose mycelium at the base; spores elliptical, .00025‘ long, 
‚00016‘ broad. Plant about 1’ high, pileus 4"—10” broad. 
Prostrate trunks of trees in woods. Sept. 
This plant bears some resemblance in color to A. ap- 
pendiculatus, but I find no trace of a veil. The stem is 
solid, and the pileus is even when dry. 
Coprinus macrosporus Pk. Pileus ovate, then expan- 
ded, rimsse-striate, obseurely floccose-squamulose, white, the 
small even brownish disk squamose; lamellse erowded, free, 
white then black; stem glabrous, white, with traces of an annulus 
near the thickened or subbulbous base; spores very large, 
elliptical, .0008°—,001’ long, .0005°—.00065° broad. Plant 
esespitose, 2'—3’ high, pileus 1‘—2‘ broad, stem 1” thick. 
Ground in open fields. Aug. i : 
The prominent characters of this species are the rimose 
pileus, squamose disk, free lamelle, and large spores. In 
its early state it resembles some species of Lepiota. It seems 
to be intermediate between the sections Atramentarii and 
Micacei. : . 
Coprinus rotundosporus Pk. Pileus thin, cam- 
panulate, whitish or pale einereus with a thin floccose sub- 
persistent tomentüm, even; lamell®e free; pie slightly 
tapering upward, white; spores subglobose, .0003°—.00035 
