76 TWENTY-FIFTH REPORT ON THE STATE MUSEUM. 
lamella; stem short, slender, firm, smooth or sprinkled with 
minute mealy particles. 
Plant gregarious, white throughout, 8-12" high, pileus 2-4” 
broad. Bark of prostrate trunks in woods. Portville. Septem- 
ber. 
Agaricus (Mycrna) Rrosrocanpipus Peck. 
Pileus convex or broadly campanulate, subpapillate, striate 
nearly to the apex, white or rosy-red; lamellz close, uncinate, 
white or rosy ; stem slender, smooth, white. 
Plant 2’ high, pileus 4’-6" broad. 
Among mosses in woods. Adirondack Mts. July. 
Usually the whole plant is pure white, but sometimes the pileus 
has a delicate rosy hue, except on the apex and margin. In such 
specimens the lamelle are tinged with the same color, and the 
delicate beauty of the whole plant can scarcely be surpassed. The 
striations of the pileus are clearly seen in the dried specimens. 
The papilla is sometimes very prominent, sometimes wanting. 
Agaricus DEBILIS Bull. 
Under spruce and balsam trees. North Elba. July. 
AGaAricus Rorinus £7. 
Mossy ground in woods. North Elba. July. 
AGARICUS PTERIGENUS F7?. 
Dead stems of ferns, Onoclea sensibilis. Sandlake. September. 
The margin of the pileus as well as of the lamelli is sometimes 
more highly colored than the rest of the piant. 
Acaricus (OmMpHALIA) ottvarius Pech. 
Pileus convex, umbilicate, smooth, yellowish-olive; lamelle 
arcuate, decurrent, subdistant, pale yellow; stem equal, short, 
smooth, hollow, colored like the pileus; spores subglobose or 
broadly elliptical, .00026’ long. ~ 
Plant 11.5’ high, pileus 1’ broad, stem 1” thick. 
Burnt ground under balsam trees. North Elba. July. 
AGARICUS GRACILLIMUS Weinim. 
Dead twigs and leaves in wet places. Sandlake. September. 
Our plant does not agree strictly with the description, since the 
lamellee are scarcely decurrent and the stem is slightly thickened 
at the base where it is furnished with an abundance of radiating 
flocci. It is at least a well marked variety, and may prove to be 
a distinet species. 
