REPORT OF THE STATE BOTANIST 55 



CoUybia tuberosa Bull. 

 Tuberous Collybia. 



(Hyni. Eur. p. 119. Syl. vol. v. p. 224.) 



Pileus thin, convex or nearly plane, obtuse or slightly umbonate, glab- 

 rous or nearly so, white; lamellee close, thin, adnate, white; stem slender, 

 clothed with a thin pulverulent white tomentum, often nearly naked 

 toward the top, whitish or slightly reddish tinted, growing from a yel- 

 lowish or reddish-brown sclerotioid tuber of variable shape; spores ellip- 

 tical, .0002 to .00024 inch long, about .00012 broad. 



Pileus 3 to 6 lines broad; stem 10 to 20 lines long, scarcely half a line 

 thick. 



Old blackened fungi and damp soil full of decayed vegetable matter. 

 Common. July to September. 



Sometimes the pileus is slightly tinged with yellow or reddish hues in 

 the center. The clothing of the stem is commonly more dense toward 

 the base. 



Collybia cirrata Schum. 

 Fringe-rooted Collybia. 



(Ilym. Eur. p. 1 19. Syl. vol. v. p. 224.) 



Pileus thin, nearly plane, sometimes slightly centrally depressed or 

 umbilicate, a httle silky, white or faintly tinged with red; lamellae nai row, 

 close, adnate, white ; stem slender, white-pulverulent, pallid, with a fibril- 

 lose radicating base; spores elliptical, minute, .00016 to .0002 inch long, 

 .0001 to .00012 broad. 



Pileus 4 to 7 lines broad; stem i to 1.5 inch long, scarcely half a line 

 broad. 



Decaying vegetable matter. Not rare. August to October. 



Closely related to and resembling the preceding species but distinguished 

 by its fibrillose radicating base and the absence of any sclerotioid tuber. 

 The specific name is commonly written " cirrhata." I have adopted the 

 more classical form employed in Sylloge. 



A form having a very slender stem and the pileus of a uniform reddish 

 hue was collected in the Catskill mountains. [ have labeled it Var. 

 rufescens. 



