84 NKW YORK STATE MUSEUM 



separable layers and by its more cupHke shape. Only four species 

 are known to belong to our flora. 



KEY TO THE SPECIES 



Stem fibrillosely reticulate cyathif ormis 



Stem not fibrillosely reticulate 1 



r Plant cespitose, pileus usually irregular caespitosa 



I Plant not cespitose 2 



2 Pileus convex, deeply umbilicate, not infundibuliform subconcava 



2 Pileus becoming infundibuliform brumalis 



Clitocybe cyathiformis Fr. 



CUP SHAPE CLITOCYBE 

 Sylloge V, p. 1 76 



Pileus fleshy but thin, centrally depressed or infundibuliform, 

 hygrophanous, glabrous or nearly so, even on the margin or occa- 

 sionally striate when old, blackish brown or grayish brown when 

 moist, paler when dry, flesh colored like the pileus, separable into 

 two horizontal layers ; lamellae distant, adnate or decurrent, united 

 behind, dingy or grayish brown ; stem ec[ual or slightly tapering 

 upward, stuffed or hollow, fibrillose, obscurely reticulate by the 

 fibrils, colored like the pileus ; spores ellipsoid, 8-9 x 4-5 fi. 



Decaying wood or on the ground. In woods or open places. 

 August and September. Common. 



Clitocybe poculum Pk. is referable to this species. 



Clitocybe caespitosa Pk. 



CESPITOSE CLITOCYBE 

 N. Y. State Mus. Rep't 41, p.6i 



Pileus thin, infundibuliform, often irregular, hygrophanous, gray- 

 ish brown when moist, cinereous or clay color when dry ; lamellae 

 narrow, close, decurrent, some of them branched, white ; stem equal 

 or slightly tapering upward, stuft'ed or hollow, white; spores sub- 

 globose or broadly ellipsoid, 3-4 fi long. 



Pileus 2.5-4 cm broad ; stem 2-3 cm long, 4-6 mm thick. 



Commonly cespitose. Woods. Catskill and Adirondack moun- 

 tains. August and September. Rare. 



This mushroom is remarkable for its irregular and deformed 

 appearance. The pileus is sometimes perforate and the stem is stout 

 in proportion to the size of the pileus. The tufts are composed of 

 but few individual plants. 



