186 Cincinnati Society of Natural History. 
long, and about an inch thick. The pileus is commonly of a greenish 
hue, but sometimes brownish. The distinguishing feature is the many 
forked lamellae. It is considered poisonous. 
2. R. sorpipa, Peck.—Pileus firm, convex, centrally depressed, dry, 
sordid white, sometimes clouded with brown. Stipe equal, solid, con- 
colorous. Lamelle close, white, some of them forked. Spores globose, 
0076 mm. in diameter. 
On the ground under beech trees in hilly woods.- Pileus 3-5 in. 
broad, stipe 4-5 in, long, and 4-1 in. thick. The taste is acrid, and the 
flesh changes color when bruised, becoming black or bluish-black; the 
whole plant turns black in drying. In its general appearance it re- 
sembles Lactarius piperatus, Scop. 
b. Lamelle broadest and rounded at the apex, short and forked, 
mixed with the others. : 
3. R. tacrea, Pers.—Mild, milk-white. Pileus fleshy, compact, 
unpolished then rivulose; the margin straight, thin, obtuse, even. 
Stipe solid, compact, thick. Lamelle free, thick, distant, rigid, some 
of them forked. 
On the ground in beech woods. Pileus about 2 in. broad, stipe 14- 
2 in. long, and 1-14 in. thick. The pileus is at first white, campanu- 
late, dry; afterward it becomes alutaceous-white, a little rimose, con- 
vexo-depressed and often excentric; lamellze at length adnate, very 
broad, forked at base and apex. 
4, R. virescens, Scheeff.—Mild. Pileus fleshy, firm, globose then 
expanded and umbilicate, innate-flocculose or areolate-verrucose; the 
margin straight, obtuse, even. Stipe spongy-solid, stout, somewhat 
rivulose, whitish. Lamelle free, rather crowded, unequal, forked, 
whitish. 
In woods. Pileus 3-4 in. broad, stipe 1 2 in. long. . Pileus often 
unequal, always dry, the cuticle breaking up into areas, of a greenish 
hue, sometimes tinged with yellow or purple. 
5. R. Lepipa, Fr.—Mild. Pileus fleshy, compact, convex, then 
depressed, unpolished, silky or rimose-scaly, expallent; the margin 
patent, obtuse, not striate. Stipe solid, compact, even, white or rose- 
color. Lamellee rotundate, rather thick, close, many of them forked, 
white. 
In beech woods. Pileus about 3 in. broad, stipe 3 in. long, and 1 in. 
thick. Pileus rosy-red, the disk becoming whitish, 
