a 
No. 104.] 63 
ular, solitary or c#spitose and imbricated, variously colored, dingy- 
yellow, reddish-brown, greenish-brown or olivaceous, the margin at 
first involute; lamella close, determinate, whitish or yellowish; stem 
very short, lateral, thick, yellowish beneath and minutely tomentose 
or squamulose with blackish points; spores minuwée, elliptical, .0002 
‘in. long, .0001 broad. 
Dead trunks of deciduous trees. Catskill and Adirondack moun- 
tains. Buffalo. G. W. Clinton. Autumn. 
The late Agaric occurs especially in the hilly and mountainous dis- - 
tricts of the State. Itrarely makes its appearance before September 
and is sometimes found as late as December. It varies considerably 
in color but is easily recognized by its peculiar stem and determinate 
lamelle. When viewed from above it appears to be stemless or 
attached by a mere basal prolongation of the pileus, but the lower sur- 
face of this prolongation, being differently colored and definitely 
limited by the basal termination of the lamelle, has the appearance 
of a very short but distinct stem. In our. plant the surface of the 
pileus is sometimes adorned with a minute brown or blackish fibril- 
lose tomentum, which gives it a somewhat punctate or scabrous 
appearance. I find no notice of this character in the descriptions of 
the European plant. Such specimens with the lower surface of the 
stem, merely tomentose, were published in the Twenty-third Report as 
Agaricus serotinoides, but they do not appear to me to be any thing 
more than a mere form of the species. Sometimes the pileus is dis- 
tinctly tomentose toward the base. 
Pleurotus tremulus, 7’. 
Tremulous Agaric. Gray Pleurotus. 
Agaricus tremulus, Scheff. 
Pileus thin, eight to twelve lines broad, obovate or reniform, plane 
or depressed on the disk, tenacious, glabrous, livid-gray or grayish- 
brown when moist, pale-gray when dry; lamellze determinate, linear, 
subdistant, gray or grayish; stem marginal, short, distinct, nearly 
terete, ascending, villose at the base; spores globose, .0003 in. broad. 
Ground among or attached to mosses. Poughkeepsie. October. 
W. R. Gerard. 
The stem in our specimens is lateral, as required by the description 
and the place assigned to the species in the Friesian arrangement, but 
in Mycological Illustrations, Pl. 242, it is represented as eccentric. 
The stem is sometimes wanting, and then the pileus is attached by 
fibrils. The ‘species is easily known by its gray color and place of 
growth. It is apparently very rare with us, having been found in our 
State but once. 
Pleurotus spathulatus. 
Spathulate Agaric. 
Agaricus spathulatus, Pers. P. petaloides v. spathulatus, Fr. 
Pileus rather thin, one to two inches broad, ascending, spathulate, 
tapering behind into the stem, glabrous, convex or depressed on the 
disk and there sometimes pubescent, a/wtaceous or brownish tinged with 
gray, red or yellow; lamellae crowded, linear, decurrent, whitish or 
