THE WHITB-SPORED AGARICS 



113 



unequal, sometimes ventricose, 

 frequently partially bulbous, 

 lighter than the gills, usually 

 spotted in age, white at first. 

 The spores are subglobose, 

 4-6/x. The plant is a hardy one. 

 It will keep for several days. 

 The plants in Figure 82 grew in 

 the woods where a log had 

 rotted down. 



Var. immaculata, Cooke, dif- 

 fers from the typical form in 

 not changing color or being 

 spotted, and in the broader and 

 serrated gills. This variety de- 

 lights in fir woods. September 

 to November. 



Figure 82. Coilybia maculata. Two-thirds natural size. 

 Reddish-brown spots on caps and stems. 



Coilybia atrata. Fr. 

 Charcoal Collybia. 



Atrata, clothed in black ; from 

 the pileus' being very black 

 when young. The pileus is 

 from one to two inches broad, 

 at first regular and convex, 

 when expanded becoming, as a 

 rule, irregular in shape, some- 

 times partially lobed or wavy ; 

 in young plants the cap is a 

 dull blackish brown, faded in 

 older specimens to a lighter 

 brown, umbilicate, smooth, shin- 

 ing. 



The gills are adnate, slightly 

 crowded, with many short ones, 

 rather broad, grayish-white. 



The stem is smooth, equal, 

 even, hollow, or stuffed, tough, 

 short, brown within and with- 

 out, but lighter than the cap. The plant grows in pastures where stumps have 

 been burned out, always, so far as I have noticed, on burned ground. Spores 

 .00023X.000T6. 



Figure 83. 



-Coilybia atrata. 

 blackish-brown. 



One-half natural size. 

 Gills grayish-white. 



Caps dull 



