=R. nauseo´sa= Fr. =Pileus= variable in color, typically _purplish at the disk_, then livid, but becoming pale and often whitish, laxly fleshy, thin, at first plano-gibbous, then depressed, viscid in wet weather, _furrowed_ and somewhat tubercular at the somewhat membranaceous _margin_. =Flesh= soft, white. =Stem= short, about 1 in. long, 4 lines thick, spongy-stuffed, slightly striate, white. =Gills= adnexed, ventricose, _somewhat distant_, here and there with a few shorter ones intermixed, light yellow then dingy ochraceous. The taste is mild, but also nauseous, as the odor often is. The habit is that of R. nitida, of the same color of pileus, but differing in the color of the gills. _Fries._ =Cap= about 2 in. across. =Stem= 1–2 in. long, ¼-½ in. thick. =Spores= dingy yellow, 8–9µ diameter. _Massee._ North Carolina and Pennsylvania, _Schweinitz_; West Virginia, Pennsylvania, New Jersey, in pine and mixed woods. August to October. _McIlvaine._ The odor and taste of R. nauseosa are misnamed, therefore the plant. They are heavy at times, when the plant is wet or old, as is the case with R. f[oe]tens, but they are always of cherry bark. Both odor and taste disappear in cooking. The species is as good as any Russula of its texture. =R. vitelli´na= Fr.—_vitellus_, yolk of egg. =Pileus= 1 in. broad, _uni-colorous_, light yellow then wholly pallid, somewhat membranaceous, at length _tuberculoso-striate_, somewhat dry, disk very small, slightly fleshy. =Stem= thin, scarcely exceeding 1 in. long, 2 lines thick, equal. =Gills= separating-free, equal, _distant_, rather thick, connected by veins, saffron-yellow. Pretty, very fragile, strong-smelling, mild. _Fries._ =Spores= 7–8µ diameter _Massee_. West Virginia, New Jersey, Pennsylvania, August to October. In pine and mixed woods, July to October. Not common in number. This pretty species has a cherry-bark taste and smell like R. f[oe]tens, though not so offensively heavy. It is not poisonous. A small piece of it will affect a whole dish of other Russulæ. =R. chamæleonti´na= Fr.—changing color like a chamæleon. =Pileus= 1–2 in. broad, thinly fleshy, soon flattened, sometimes oblique with a thin, separable, viscid pellicle, which is at first flesh-color, then presently changing color, becoming yellow at the disk and at length wholly yellow, margin even, then slightly striate. =Stem= as much as 3 in. long, but thin, somewhat hollow, slightly striate, white. =Gills= more or less adnexed, _thin, crowded_, equal, narrow, somewhat forked, light-yellow-ochraceous. Mild, inodorous, very fragile. =Pileus= _rosy blood-red, purplish lilac_, etc. Sometimes even at the first yellowish at the disk. _Fries._ =Spores= globose, ochraceous, 7–8µ diameter _Massee_. In pine and in mixed woods. August to October. _McIlvaine._