KUSSULA. 75 



constricted, then equal, slightly striate, white then reddish ; 

 spores 9-10 /x, diameter. 



Bussula sanguinea, Fries, Epicr., p. 351 ; Cke., Hdbk., p. 

 322 ; Cke. Illustr., pi. 1019. 



Among grass in woods. 



B. rubra agrees with the present species in colour, but 

 differs in the very hard, rigid, somewhat grumous flesh of 

 the pileus, and in the gills becoming yellowish. Known 

 from all other species by the truly decurrent gills. 



Russula fragilis. Fr. 



Acrid. Pileus 1-1 i in. across, flesh very thin and very 

 fragile ; convex at first and often umbonate, then plane and 

 depressed, pellicle thin, rather viscid in moist weather, 

 becoming pale, colour variable, often opaque, typically flesh- 

 colour, becoming almost or entirely white, often with reddish 

 spots ; margin very thin, tuberculosely striate ; gills slightly 

 adnexed, very thin, broad, crowded, ventricose, all equal, 

 pure white; stem li-2 in. long, slender, often slightly 

 striate, shining white, spongy within and soon hollow; 

 spores minutely echinulate, 8-10 x 8 /x. 



Bussula fragilis, Fries, Epicr., p. 359; Cke., Hdbk., p. 333; 

 Cke., Illustr., pi. 1091. 



In woods, &c. 



Difficult to define from fragile forms of B. emetica, but the 

 gills are much more crowded, ventricose, thinner, and the 

 margin often eroded ; pileus thinner, more lax ; flesh en- 

 tirely white — not red under the cuticle ; margin tuberculose, 

 and the entire fungus smaller and more fragile. 



Far, nivea, Cke., Hdbk., p. 333; Cke., Hlustr., pi. 1060b. 

 Size and habit of type form, but every part white from 

 the earliest stage ; spores 8 /a diameter. 



Var. violacea, Quelet, Assoc. Fr., 1882, t. 11, f. 13 ; 

 Cke., Hdbk., p. 334 ; Cke., Hlustr., pi. IOGOa. 



Pileus about 1^ in. across, expanded and depressed, thin, 

 viscid, striate, bright violet with a narrow whitish margin, 

 sometimes spotted w4th j^ellow, green, or olive ; flesh soft, 

 Avhite, peppery; stem about 1-^- in. long, 2-3 lines thick, 

 fragile, striate, pruinose, white, spongy then hollow ; gills 

 aduate, crowded, thin, white ; spores 8—9 /x, spinulose. 



