122 AGARICINI. 



Russula. with purple. Gills somewhat crowded, narrowed behind, furcate, 

 adnexed or nearly free, white. 



Mild. Allied to ^?. virescens which it resembles in the cracking of the 

 cuticle, but differs in the purple tint beneath even in green specimens, and in 

 the tinted stem, as well as in the colour of the pileus, which is of a darker and 

 different shade of green, and sometimes of a deep bluish-purple, as well as of 

 a madder-red. 



On the ground in woods. Epping, &c. 



Name cutis, skin ; frango, to break. From the cracked cuticle. Cke. in 

 Grevillea, vol. x. p. 46. 



IV. HETEROPHYLLyE. 



21. R. vesca Fr. Pileus red-flesh-colour, disc darker, fleshy, 

 slightly firm, piano-depressed, sliglitly wrinkled with veins, with 

 a viscid pellicle, margin at length spreading; flesh cheesy, firm, 

 shining white. Stem solid, compact, externally rigid, reticulated 

 and wrinkled in a peculiar manner, often attenuated at the base, 

 shining white. Gills adnate, crowded, thin, shining white, with 

 many unequal and forked ones intermixed, but scarcely connected 

 by veins. 



Of middle stature. Taste mild, pleasant. 



In mixed woods. Frequent. Sept.-Oct. 



Reckoned edible. Name vesco, to feed. From its edible qualities. Fr. 

 Monogr. ii. p. .193. Hym. Eur. p. 446. Sv. dtl. Sv. t. 63. Berk. Out. p. 

 211. C. Hbk. n. 625. S. Mycol. Scot. n. 596. (fJusseyi. t. 89.) 



22. R. cyanoxantha Fr. Pileus 5-7.5 cent. (2-3 in.) and more 

 broad, lilac or purplish then olivaceous-green, disc commonly be- 

 coming pale often yellowish, margin commonly becoming azure- 

 blue or livid-purple, compact, convex then plane, then depressed 

 or infundibuliform, sometimes even, sometimes wrinkled or 

 streaked, viscous, margin deflexed then expanded, remotely and 

 slightly striate ; flesh firm, cheesy, white, commonly reddish be- 

 neath the separable pellicle. Stem 5-7.5 cent. (2-3 in.) long, as 

 much as 2.5 cent, (i in.) thick, spongy-stuffed, but firm, often 

 cavernous within when old, equal, smooth, even, shining white. 

 Gills rounded behind, connected by veins, not much crowded, 

 broad, forked with shorter ones intermixed, shining white. 



Allied to R. vesca in its mild, pleasant taste and in other respects, but con- 

 stantly different in the colour of the pileus, which is very variable, whereas in 

 R. vesca it is unchangeable. The peculiar combination of colours in the 

 pileus, though very variable, always readily distinguishes it. 



In mixed woods, c. Common. Aug. -Oct. 

 Sometimes considerably larger than Fries describes. Name KiWos, blue ; 



