EUSSULA. 71 



On the ground. 



Gregarious. Pileus 4^5 in. broad, at first convex, the 

 margin broadly folded inwards, convex, at length more or 

 less depressed with the margin somewhat vaulted, fleshy in 

 the centre, the margin thin, furrowed and tubercled, the 

 striae appearing as if a glutinous membrane were stretched 

 over them, dirty yellow, rather brittle. Gills forked, dirty 

 white or yellowish, moderately broad, connected by veins. 

 Stem 34 in. high, above 1 in. thick, obtuse, incrassated 

 at the base, ruggedly hollow within, as if eaten by snails, 

 white or with a dirty yellow tinge, depresso-tomentose, 

 beneath the gills minutely pitted longitudinally, flesh rather 

 yellow. Highly acrid, odour very strong, and penetrating, 

 empyreumatic, somewhat resembling that of prussic acid, but 

 exceedingly disagreeable. (Berk.) 



Rnssula eonsobrina. Fr. 



Acrid. Pileus about 3 in. across, flesh rather thin at the 

 disc, becoming membranaceoBs. at the margin, fragile, white, 

 greyish below the thick, viscid, separable cuticle ; carnpanu- 

 late then expanded, at length depressed, dark grey or olive- 

 brown, margin spreading, even, although membranaceous ; 

 gills at first free, then appearing to be adnate owing to 

 the expansion of the pile us, broad, crowded, clear white, 

 forked, and with shorter intermediate ones; stem 2-3 in. 

 long, almost an inch thick, equal, even, glabrous, clear 

 white, at length becoming grey, solid but soft; spores 

 nearly smooth, white 8-9 X 7 /x.. 



Bussula eonsobrina, Fries, Epicr., p. 359 ; Cke., Hdbk., p. 

 329 ; Cke., Illustr., pi. 1055. 



In woods. 



Very acrid; easily known by the even, umber or olive- 

 brown pileus, which has usually more or less of a grey tinge. 

 The cuticle often becomes more or less broken up at the margin. 



Far. sororia, Fries, Hym. Eur., p. 447 ; Cke., Illustr., pi. 

 1057 ; Cke., Hdbk., p. 329. 



Size, colour, and habit of the typical form ; differing in the 

 etriate margin of the pileus ; gills rather distant, with many 

 intermediate shorter ones, but rarely forked, connected by 

 veins. 



In woods, &c. 



