Leucosporae 



with reddish spots or stains. Flesh white. Gills narrow, crowded, CoUybia. 

 adnexed, sometimes nearly or quite free, white or whitish. Stem gen- 

 erally stout, firm, equal or slightly swollen in the middle, striate, white, 

 stuffed or sometimes hollow, commonly narrowed at the base, rooting, 

 often curved at the base, rarely slightly thickened and blunt. Spores 

 subglobose, 4 6/A broad, sometimes showing a slight point at one end. 



Pileus 2-4 in. 'broad. Stem 2-4 in. long, 3-6 lines thick. 



Var. immacula'ta Cke. This differs from the type in having no red- 

 dish spots or stains. 



This species is easily recognized by its large size, firm or compact 

 substance and white color. It grows in soil filled with decaying vegeta- 

 ble matter or on much decayed wood. Peck, 49th Rep. N. Y. State Bot. 



West Philadelphia, Pa. Weed grown lot near University of Penn- 

 sylvania. September to frost. Grew gregariously over a large lot. 

 The plants varied greatly in size and appearance. The gills of most 

 were crenulate (scalloped). Assorted specimens were sent Professor 

 Peck who wrote: "They are all forms of C. maculata." 



The caps were stewed and eaten in abundance by many, and pro- 

 nounced "Fine." 



C. blltyra'cea Bull. butyrum, butter; buttery to the touch. Pileus 

 23 in. broad, normally reddish- (Plate XXX.) 

 brown, but becoming pale, fleshy, 

 convex then expanded, more or less 

 nmbonate, dry, even, smooth. Flesh 

 buttery, soft, somewhat hygrophan- 

 ous, flesh-color then white. Stem 

 23 in. long, attenuated upward from 

 the thickened white downy base, 

 hence much thinner at the apex, 2-3 

 lines only, but at the base % I in. 

 thick, externally covered over with a 

 rigid cartilaginous cuticle, internally 

 stuffed with soft spongy pith, or hol- 

 low only when old, striate, reddish, 



COLLYBIA BUTYRACEA. 



commonly smooth, but varying with 



white deciduous scales, and occasionally wholly downy with soft hairs. 



117 



