52 TWENTY-SIXTH REPORT ON THE STATE MUSEUM. 
rent lines on the stem; stem nearly equal, solid, white; spores 
globose, .00018 in. in diameter. 
Plant 3-4’ high, pileus 2’-4’ broad, stem 3’—5” thick. 
Ground in woods. Worcester. July. 
The ornamentation of the margin of the pileus is a convenient 
mark of specific distinction. 
Agaricus (TricHotoma) Limontum Peck. 
Pileus thin, broadly convex or expanded, smooth, yellowish ; 
lamelle crowded, narrow, not forming decurrent lines on the stem, 
lemon yellow; stem tapering downwards, smooth, striate, radi- 
cating. 
Plant 3-4’ high, pileus 2-3’ broad, stem 3’-4" thick. 
Ground in woods. Worcester and Croghan. July and Sep- 
tember. 
The lemon yellow color, especially distinct in the lamelle, and 
the tapering root-like prolongation of the stem characterize this 
species. 
AGARICUS LEUCOCEPHALUS Arombh. 
Ground in woods. Croghan. September. 
This plant is sometimes ceespitose. Its stem is narrowed at the 
base into a tapering root-like prolongation. 
Agaricus (TRICHOLOMA) FUMIDELLUS Peck. 
Pileus convex, then expanded, subumbonate, smooth, moist, 
dingy white or clay-color clouded with brown ; lamellee close, sub- 
ventricose, whitish; stem equal, smooth, solid, whitish; spores 
.00018 x .00015 in. 
Plant 2’-3’ high, pileus 1'- 2‘ broad, stem 2"-3" thick. 
Ground in woods. New Scotland. October. 
The disk is generally darker than the margin. The pileus 
becomes paler in drying. The stem splits easily. 
Agaricus (TricHotoma) tHusInus Peck. 
Pileus convex or centrally depressed, smooth, hygrophanous, 
pale alutaceous, the margin generally irregular, wavy or lobed; 
lamellee crowded, thin, abruptly emarginate, alutaceous; stem 
slightly thickened at the top, smooth, hollow, concolorous, whitish- 
villous at the base. 
Plant 2’ high, pileus 2’ broad, stem 2°-3" thick. 
Swampy ground, mnie arbor-vite, Thuja occidentalis. Mem- 
phis. August. 
