CLASSIFICATION OF AGARICS 111 



it has a good flavor after cooking, which destroys the Blight acrid 



taste. 



Micro-chemical tests: <i. (Flesh and ^ills quicklj deep blue 

 s V. (Gills slow ly ill in- ; flesh slightly blue-tinged.) F B. (No effect. I 



117. Russula cyanoxantha Fr. var. (Edibli 



Monographia, L865. 



Illustrations: Michael, Blatterpilze, Vol. II. No. 59. 

 Gillet, Champignons de France, No. 605. 

 Cooke, III.. PI. L076 and l <>77. t Doubtful. I 

 Bresadola, Fungh. Mang. e. vel., PI. 71. (Doubtful.) 



PILEUS 5-10 cm. broad, rigid, convex then expanded and • 

 pres>rd in the center or subinfundibuliform, dark bluish-purpU 

 lilac <>n margin, disk dingy whiU tiin/<<l rosi pink, cuticle thin and 

 adnate, viscid, separable on margin, even, or substriate only aear 

 edge, surface somewhat wrinkled <>i- streaked. FLESH white, com- 

 pact, purplish in- lilac under cuticle. GILLS white, ;i few forked 

 toward base, few shorter, moderately broad, not very distant, oar- 

 rowed behind, intervenose. STEM 6-9 cm. long, 1-- cm. thick, 

 white, sni>e<|ual, spongy-stuffed, cortex hard, sometimes cavernous 

 and compressed, glabrous, even or obscurely wrinkled. SPORES 

 white in mass. TASTE mild. ODOK none. 



Scattered or gregarious. Maple and birch, or mixed w Is of 



northern Michigan, oak and maple woods of the southern part 

 Jnly-Angnst. Not infrequent. 



The above description applies to a definite form which occurs m 

 Michigan and is quite constant. It does mn agree with the >pe. :ies 

 understood by Komell, Ma ire and IVltereanx in Europe, whose typ- 

 ical plant has creamy-white uills and spores. Our species ap- 

 proaches R. azitrca Bres. in color, bu1 thai plant is rather fra( 

 and is related to the /.'. emetioa group. Michael's figures show the 

 colors of the cap when young and uui yet decolorized on the disk. 

 It is more frequent northward and may be distinct from the Euro- 

 pean plant. 



