Supplement 



(Plate CXCVIII.) 



entire. These surface chinks form small areolae or scales, which appear 

 like fragments of a crustaceous cuticle. 



The color varies greatly. It may be straw-yellow, pale ochraceous, 

 brownish ochraceous, greenish with a yellowish ochraceous center or a 

 dull brownish purple. The center is sometimes paler, sometimes darker 

 than the margin. The gills are white, narrowed toward the stem and 

 nearly free. They are sometimes forked, especially near the stem, and 

 intervening short ones occur near the margin. They are white and un- 

 changeable. The stem is also white. This mushroom is more common 

 with us than the greenish russula, which it resembles in size and flavor. 



Edible. The flesh is white and the taste mild or sometimes slightly 

 and tardily acrid. The acridity if present is destroyed by cooking. Peck. 



Russula rugulosa Pk. Rep., 1900: 179. Rugulose Russula. Pileus 

 rather thin, fragile, convex, becoming nearly plane or centrally depressed, 

 viscid when moist, roughened or uneven with small tubercles and rugae, 



even on the margin when young, becoming 

 tuberculate striate with age, the viscid pellicle 

 separable on the margin. Flesh white, reddish 

 under the cuticle, taste tardily acrid . Lamellae 

 rather close, adnate or slightly rounded be- 

 hind, white. Stem nearly equal, spongy 

 within, white. Spores white, rough, sub- 

 globose, 8 IO/A broad, shining in trans- 

 mitted light. 



The rugulose russula is closely related to 

 the emetic russula, but differs from it in the 

 uneven or rugulose surface of the cap, in the 

 tardily acrid taste and in its closer adnate 

 gills. Its cap is red, varying from pale-red 

 to dark-red, viscid when moist, even on the 

 margin when young, but somewhat tuber- 

 culate and striate when old. Its surface is 

 roughened by minute tubercles or pimples, 



which sometimes appear to run together and form short ridges. These 

 are sometimes absent from the center of the cap. The viscid cuticle 

 easily peels from the margin of the cap, but not from the center. The 

 flesh is white, except just under the cuticle, where it is reddish. It is 



720 



'/2 nat 



