COLLYBIA. 151 



Agaricus (Collybiai) clusilis, Fries, Epicr., p. 98 ; Cke., 

 Hdbk., p. 74; Cke., niiistr., pi. 24:7b. 



In woods. 



Allied to C. tylicolor but differs in the umbilicate pileus 

 and decurrent tooth to the gills. The same features sepa- 

 rate this species from C. nummularia. 



OoUytaia tylicolor. Fr. 



Pileus |— g in. across, flesh thin, convex then expanded, 

 somewhat umbonate, even, unpolished, opaque, bluish-grey, 

 everywhere powdered with white meal when young ; gills 

 free, distant, broad, plane, rather thick, grey but paler than 

 the pileus ; stem about 1 in. long and 1 line thick, equal, 

 even, grey, everywhere powdered with white meal, hollow. 



Agaricus (Collyhia) tylicolor, Fries, Epicr., p. 98 ; Cke., 

 Hdbk., p. 74 ; Cke., lUustr., pi. 247a. 



In woods. 



Inodorous. Known by being entirely grey, and in having 

 the pileus and stem powdered with white, at least when 

 young. 



Introduced species. 



CoUybia caldarii. Berk. 



Pileus I in. across, hemispherical, umbonate, brown, 

 rugose, not turning pale; stem paler, even, cartilaginous 

 externally, 2 in. high, not a line thick ; gills adnato-deour- 

 rent, somewhat ash-coloured, interstices near the margin 

 veined. 



Agaricus (Collyhia^ caldarii. Berk., Grevillea, i. p. 89 ; 

 Cke., Hdbk., p. 75. 



On Sphagnum in an orchid pot at Dangstein. 



CoUybia Dorotheae. Berk. 

 Pileus 1 in. and more across, at first globose, dark brown, 

 then flatly hemispherical, at length expanded, with a slight 

 umbo, and eventually depressed, pale brown, radiately 

 sulcate from the crenate margin almost to the centre, granu- 

 lated, beset with short white bristles, which in the young 

 state point in every direction; stem 2-2^ in. high, scarcely 

 a line thick, at first brownish above, white below, with a 

 minute disc-like swelling at the base, then yellowish or 

 rufous below and white above, granulated like the pileus, 



