REPORT OF THE BOTANIST. . 77 
Agaricus (PLUrEtvs) sTERILoMARGINATUS Peck. 
Pileus broadly convex or expanded, with a slight oppressed 
tomentum, white with a faint pinkish tinge, the thin margin 
exceeding the lamellz ; lamell close, subventricose, free, minutely 
eroded on the edge, tapering outwardly, pale flesh-color; stem 
short, equal, solid, smooth, sometimes curved, whitish ; spores sub- 
globose, angular, with a central nucleus, .00025/ in diameter. 
Plant 1’ high, pileus 6"-12" broad, stem .5" thick. 
Rotten logs and sticks in woods. Portville. September. 
The pileus is sometimes cracked, and then it has the appearance 
of being coated with a thin, scaly paste. 
Agaricus (PHortora) ALBocRENULATUS Peck. 
Pileus fleshy, firm, convex or campanulate, subumbonate, viscid, 
rough with dark-brown or blackish flocecose scales, yellowish- 
brown ; lamellz broad, subdistant, emarginate, white-crenulate on 
the edge, grayish, then ferruginous; stem firm, equal or slightly 
tapering upward, sometimes curved, stuffed or hollow, squamose 
and pallid below the evanescent ring, white and slightly furfurace- 
ous above ; spores subelliptical, .00045' long, .00025’ broad. 
Plant 3-5’ high, pileus 2-3’ broad, stem 3’—5" thick. 
Mossy base of maple trees in woods. Adirondack Mts. July 
and August. 
This is a large species, quite rare and somewhat variable. I 
have never been able to find more than one or two plants in a 
place. The scales of the pileus sometimes disappear, leaving the 
surface mottled with dark-colored spots. The spores are subacute 
at each end and the curvature of one side is greater than that of 
the other. Under a lens the lamellz appear to be beaded on the 
edge with minute milky globules. 
Agaricus (PHorrota) Acericota Peck. 
Pileus thin, except on the disk, broadly convex, glabrous, rugose- 
reticulated or corrugated, hygrophanous, yellow; lamelle close, 
emarginate, grayish, then ferruginous-brown ; stem equal or thick- 
ened at the base, hollow, fibrillose-striate, white; annulus large, 
membranaceous, persistent, deflexed, usually stained by the spores 
which are elliptical, .00035’ long, .00025' broad. 
Plant 3-4’ high, pileus 2'-3' broad, stem 3’—5" thick. 
Mossy trunks of maple trees in woods. North Elba. Angust. 
The large flabby annulus and lacunose pileus enable this species 
to be easily recognized. 
