R. citrina can hardly be classed among the acrid species. The taste is slightly of cherry-bark and disappears in cooking. It is usually found in patches which contain ten to twenty individuals. It is a species of fair quality. =R. fra´gilis= Fr.—fragile. =Pileus= 1–1½ in. broad, rarely more, flesh-color, changing color, very thin, fleshy only at the disk, at the first convex and often umbonate, then plane and depressed, pellicle thin, becoming pale, slightly viscid in wet weather; _margin_ very thin, _tuberculoso-striate_. =Stem= 1½-2 in. long, spongy within, soon hollow, often slightly striate, white. =Gills= slightly adnexed, very _thin, crowded_, broad, _ventricose_, all equal, shining white. _Fries._ Very acrid. Smaller and more fragile than the rest of the group, directly changing color. The color is variable, often opaque, typically flesh-color, when changed in color white externally and internally, often with reddish spots. Among varieties of color is to be noted a livid flesh-colored form, with the disk becoming fuscous. It is not easy to define it from fragile forms of R. emetica, but the gills are much more crowded, thinner, and often slightly eroded at the edge, ventricose; the pileus thinner and more lax, etc. _Stevenson._ Var. _nivea_ Fr.—_nivea_, snowy. Whole plant white. =Spores= minutely echinulate 8–10×8µ _Massee_. Though one of the peppery kind, I have not, after fifteen years of eating it, had reason to question its edibility. The caps are not meaty, but what there is of them is good. =R. puncta´ta= Gillet—_punctata_, dotted. =Mild.= =Pileus= 1½-2½ in. across. =Flesh= thin, white, reddish under the cuticle; convex then flattened, viscid, rosy, disk darkest, punctate with dark reddish point-like warts, pale when old; margin striate. =Gills= slightly adnexed, 2 lines broad, white then yellowish, edge often reddish. =Stem= about 1 in. long, 4–5 lines thick, attenuated and whitish at the base, remainder colored like the pileus, stuffed. =Spores= 8–9µ diameter _Massee_. Among grass. Edible. Boston Myc. Club Bull. 1896. ** _Gills and spores white then yellowish or bright lemon._ =R. in´tegra= Fr.—_integer_, entire, whole. =Pileus= 4–5 in. across, typically red, changing color, fleshy, campanulato-convex then expanded and depressed, fragile when full-grown, with a gluey pellicle, at length _furrowed and somewhat tubercular_ at the margin. =Flesh= _white_, sometimes yellowish above. =Stem= at first short, conical, then club-shaped or _ventricose_, as much as 3 in. long, up to 1 in. thick, spongy-stuffed, commonly stout, _even_, shining _white_. =Gills= somewhat free, very broad, up to ¾ in., equal or bifid at the stem, somewhat distant, connected by veins, pallid-white, at length light yellow, _somewhat powdered yellow with the spores_.