94 NEW YORK STATE MUSEUM 



Russula palustris Pk. 



SWAMP RUSSULA 

 State Mus. Rep't 53. 1900. p. 842. 



Pileus thin, fragile, subglobose or hemispheric becoming convex 

 or nearly plane, viscid when moist and covered with a separable pel- 

 licle, obscurely tuberculose striate on the margin, reddish buff to 

 purplish red, flesh white, tinged with reddish buff under the pellicle, 

 taste tardily acrid ; lamellae entire, moderately close, whitish becom- 

 ing yellowish, interspaces venose; stem equal, glabrous, spongy 

 within or hollow, fragile, white or tinged with red; spores pale 

 yellow, subglobose, .0003-.0004 of an inch long, uninucleate. 



Pileus 2-3 inches broad; stem 1.5-3 inches long, 4-6 lines thick. 



Swamps, under alders. St Lawrence county. August. Rare. 



Related to R. decolorans Fr. but smaller, thinner, more 

 fragile, tardily acrid and not discoloring or assuming cinereous hues 

 with age. 



Russula decolorans Fr. 



DISCOLORED RUSSULA 



Pileus fleshy, firm, globose becoming plane or centrally depressed , 

 slightly viscid when moist, polished, even on the margin, becoming 

 striate with age, orange-red becoming paler with age, flesh white, 

 becoming cinereous and variegated with black spots when broken, 

 taste mild; lamellae thin, close, adnexed, fragile, sometimes forked 

 at the base, white becoming yellowish ; stem long, cylindric, solid or 

 spongy within, white becoming cinereous, specially within ; spores 

 subglobose, yellowish, .0003-.0004 of an inch long, nearly as broad. 



Pileus 2-4 inches broad; stem 2-4 inches long, 5-10 lines thick. 



Woods. July to October. Not rare. 



Russula obscura Rom. 

 OBSCURE RUSSULA 



Pileus fleshy, convex becoming nearly plane, even on the margin 

 or only slightly striate when old, dark red or purple sometimes black- 

 ish in the center, not becoming paler with age, subpruinose on the 

 margin ; lamellae, spores, size and stem as in R . decolorans. 



Albany, Rensselaer and Suffolk counties. July and August. 



The chief difference between this species and R. decolorans 

 is found in the color of the pileus. This is variable but darker than 

 in the typical form of that species and more persistent. The flesh 

 and stem become cinereous or smoky brown. 



