44 



Ground in woods. Worcester and Croghun. July and Septem- 

 ber. 



The lemon color of the lamellae and the root-like prolongation of 

 the stem characterize this species. 



Agaricus (Tricholoma) virescens. Peck. 



Pileus convex or expanded, sometimes depressed centrally, moist, smooth, 

 dingy-green, the margin sometimes wavy or lobed ; lamellae close, gradually 

 narrowed toward the outer extremity, rounded or slightly emarginate at the 

 inner, white; stem subequal, stuffed or hollow, thick but brittle, whitish, 

 sometimes tinged with green ; spores broadly elliptical, .0003' x .00015'. 



Plant 3'-5' high, pileus 3'-5' broad, stem 6"-12" thick. 



Mossy ground in open woods. North Elba. July. 



Agaricus (Tricholoma) fumidellusj Peck. 



Pileus subumbonate, smooth, moist, dingy-white or clay colored, clouded 

 with brown ; lamellae close, subventricose, whitish ; stem equal, smooth, solid, 

 whitish ; spores, .00018' x .00015'. 



Plant 3'-3' high, pileus l'-2' broad, stem 3"-3" thick. 



Ground in woods. New Scotland. October. 

 The disk is generally darker than the margin. The pileus be- 

 comes paler in drying. The stem splits easily. 



Agaricus (Tricholoma) fallax, Peck. 



Pileus firm, convex or expanded, rarely depressed in the center, moist, 

 smooth, dull saffron color ; lamellae crowded, narrow, tapering toward the 

 outer extremity, rounded at the inner, yellow ; stem short, smooth, stuffed or 

 hollow, usually tapering toward the base, colored like the pileus ; spores mi- 

 nute, Bubelliptical, .00013' long. 



Plant gregarious, l'-1.5' high, pileus C"-15" broad, stem 1" thick. 



Ground under spruce and balsam trees. North Elba. July, 



Agaricus (Tricholoma) thujinus^ Peck. 



Pileus convex or centrally depressed, smooth, hygrophanous, pale alutace- 

 ous, the margin generally irregular, wavy or lobed ; lamellae 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 under Thvja occidentaJis. Memphis. August. 



