REPORT OF THE BOTANIST. 97 
The species of this subgenus are easily recognized, though 
not always easily distinguished from each other. The pileus 
is generally white or yellowish, the lamelle at length brown 
or blackish, and the stipe generally rather stout, fleshy and 
_ annulate. 
SYNOPSIS OF THE SPECIES. 
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* 90. AGARICUS CAMPESTRIS L. 
Pileus thick, fleshy, convex, smooth or slightly silky, white, 
the margin surpassing the gills; lamelle close, rounded, free, 
bright flesh-colored, then blackish-brown; stipe short, stout, 
white, stuffed, annulate, not bulbous; annulus white, single. 
Height about 2’, breadth of pileus 13’, stipe 4-6” thick. 
Grassy ground in fields. Albany. September. 
Not abundant. Edible. This is the species commonly 
cultivated, and generally know by the indefinite term J/ush- 
room. 
91. AGARICUS SILVICcoLA Vite. 
Pileus fleshy, campanulate, becoming convex, smooth, 
white or yellowish, the margin scarcely exceeding the gills 
and often purplish-stained ; lamellze whitish, then pinkish 
brown, narrower toward either end, rounded and free; stipe 
rather long, stout, stuffed or hollow, bulbous, annulate, white ; 
annulus thick, double, the outer part often splitting into 
rays. 
Height 4’- 6’, breadth of pileus 3’—5’. 
Ground in pine woods. West Albany. October. 
This species is sometimes called a variety of A. campestris ; 
but Seed rae to me to be clearly distinct. The bulb of the 
stem is flattened. The exterior of the annulus is sometimes 
stained with yellow, and the pileus becomes more yellow by 
bruising. 
92. AGARICUS HORNEMANNI FY. 
Pileus fleshy, convex, becoming expanded, smooth, viscid 
when moist, pale yellow ; lamellee moderately broad, attached, 
[ Assem. No. 133.] 13 
