Leucosporae 



becoming yellow when dry, with a few dimidiate ones intermixed, some- Russuia. 

 what anastomosing behind. Fries. 



Spores wholly white, Fries; ellipsoid, spheroid, echinulate, i I/A 

 Q.; 9-nx8-9/i Massee. 



West Virginia, 1881-1885. West Philadelphia, Pa., on Bartram's 

 Botanic creek. Mcllvaine. 



R. Linnaei is one of our handsomest and best Russulae. European 

 authors state its habit to be exactly that of R. emetica, but though I have 

 known it intimately for many years I have not been struck with this in 

 the American plant. Its large size, its more or less red stem never en- 

 tirely white, at times hollow, cavernous, its less solid flesh, habit of grow- 

 ing in troops, sometimes parts of rings, flourishing best where the leaf 

 mat is heaviest, loving the leaf drift in fence-corners, are well marked 

 distinctions. 



When young there is no better Russuia. As it ages the stem be- 

 comes soft, spongy and should be thrown away. The caps, only, eaten. 



R. oliva'cea Fr. oliva, an olive; olivacetis, the color of an olive. 

 Pileus 24 in. across, dingy-purple then olivaceous or wholly brownish- 

 olivaceous, fleshy, convexo-flattened and depressed, slightly silky and 

 squamulose, margin spreading, even. Flesh white, becoming somewhat 

 yellow. Stem firm, ventricose, rose-color to pallid, spongy-stuffed 

 within. Gills adnexed, wide, yellow, with shorter and forked ones 

 intermixed. 



Mild. Near to R. rubra, but certainly distinct in the stem being 

 definitely spongy, in the pileus being unpolished, and in the gills being 

 soft and brightly colored; corresponding with R. alutacea. Fries. 



Spores light yellow, Fries; spheroid, punctate, IO/A Q.; globose, 

 minutely granulate, yellow, 9-io/x diameter Massee. 



Mt. Gretna, Pa., 1897-1898. 



Pileus 2-4 in. across, 2-3 in. long, %-Ys, in. thick. 



The caps are equally good with R. alutacea. They must be fresh, 

 and similarly cooked. 



R.fla'vida Frost yellow. (Plate XLIV, fig. 3, p. 184.) PileilS 

 fleshy, convex, slightly depressed, unpolished, bright yellow. Gills 

 white, adnate, turning cinereous. Stem yellow, solid, white at the ex- 

 treme apex. Frost Ms. 



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