No. 104.] 63 



ukr, solitary or casspitose and imbricated, variously colored, dingy- 

 yelloio, reddish-hrown, greenif<h-hrow)i or olivaceous, the margin at 

 first involute; lamella3 close, determinate, whitish or yellowish; stem 

 very short, lateral, thick, yellowish beneath and minutely tomentose 

 or squamulose with blackish points ; spores minute, eUijjtical, .0003 

 in. long, .0001 broad. 



Dead trunks of deciduous trees. Catskill and Adirondack moun- 

 tains. Buffalo. G. ]V. Clinton. Autumn. 



The late Aigaric occurs especially in the hilly and mountainous dis- - 

 tricts of the State. It rarely 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 

 lamella?. 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 lamelUe, 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, Fr. 



Tremulous Agaric. Grray Pleurotus. 



Agaricus tremulus, Schteff. 



Pileus thin, eight to twelve lines broad, obovate or reniform, plane 

 or depressed on the disk, tenacious, glabrous, livid-gray or gi^ayish- 

 browti when moist, pale-gray when dry ; lamellaB 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, PI. 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, sj)athulate, 



tapenng behind into the stem, glabrous, convex or depressed on the 



disk and there sometimes pubescent, alutaccous or brownish tinged with 



(jray, red or yellow; lamellae crowded, linear, decurreut, whitish or 



