2IO BRITISH FUNCI 



rallicr crowded and sonicwhat branclied, white ; stem minute, 

 lateral, or absent. 



On tree-fern stem in a hothouse. I'robably an exotic species. 



P. Hmpidus. — Cap thin, ol, ovate or reniform, horizontal, even, 

 smooth, liygrophanous, white when moist, shining white when dry, 

 not furnished with a \-iscid pellicle, J-i in. across ; gills thin, 

 crow-ded, white ; true stem absent, but the cap is narrowed behind 

 into a very short stem-like base, on which the gills are de- 

 current. 



With the habit and ajipcarance of P. mil is, but entirely shining 

 white and subsessile. 



On rotten beech trunks, etc. 



P. reniformis. — Cap rather fleshy, horizontal, reniform, rather 

 notched behind, and furnished with a very short, rudimentary stem, 

 grey ; gills diverging from the stem-like base, thin, narrow, crowded, 

 grey. 



Stem reduced to a white, downy knob, cap thin, downy, grey, 

 flesh thin, rather gelatinous. 



On branches. 



P. lauyo-cerasi. — Cap thin, equal, sessile, horizontal and attached 

 by a narrow base, more or less circular in outline, or cockle-shell- 

 shaped, striate, brownish, up to li in. across ; gills very broad at 

 the middle, narrowed towards each end, rather thin, connected by 

 veins, edge wavy, whitish. 



Cap strongl}.' striate or grooved. 



On stems of cherry laurel. 



P. tremuliis. — Cap thin, dimidiate, somewhat horizontal, reni- 

 form, plane, depressed and often downy behind, the remainder 

 smooth, even, greyish brown, becoming pale, hygrophanous, about 

 I in. across ; gills adnate, appearing to be decurrent from the 

 depression of the cap, narrow, distant, very imequal, grey ; stem 

 distinct, exactly lateral, about J- in. long, or sometimes very short, 

 dilated upwards, attached by fibrils to mosses. 



\'ariable. Entire fungus grey. Differs from P. reniformis by the 

 presence of a distinct stem. 



On mosses and on the ground. 



P. accrosus. — Cap very thin, reniform or almost orbicular, plane, 

 somewhat lobed, striate, hygrophanous, greyish, when dry with a 

 white silkiness, up to i in. across ; gills determinate, narrow, 

 crowded, simple, greyish ; stem lateral, very short or almost want- 

 ing, rather coarsely downy at the base. 



Very variable. Limp, greyish brown, then pale, resembling Can- 

 thaycllits lobatus in general appearance. Fixed by spreading white 

 mycelium when growing on Sphagnum in swamps. 



On wood, among leaves, on bare gravel, etc. 



