Several common, prolific, long-season, delicious fungi occur in this genus. They vary in size from “a small coin” to five inches across. They grow in woods, on wood, on ground, on leaves, on lawns and among moss and grass in shaded places. The writer has tested many species raw, and eaten small quantities cooked, which are not herein described for the reason that not enough of a species was found to test to full extent. So far as is reported and as his experience goes, there is not a poisonous species in Collybia. Many of them are strong in odor. [Illustration: Photographed by Dr. J.R. Weist. PLATE XXIX. COLLYBIA RADICATA. ] ANALYSIS OF TRIBES. _Series A._ GILLS WHITE OR BRIGHTLY COLORED, NOT GRAY. FLESH WHITE. STRIÆPEDES (striate-stemmed). Page 113. Stem stout, hollow or imperfectly filled with a spongy pith; grooved or striate with fibers. * Gills broad, rather distant. ** Gills narrow, crowded. VESTIPEDES (clothed-stemmed). Page 118. Stem thin, equal, hollow or with a pith, even, velvety, downy or covered with a bloom. * Gills broad, rather distant. ** Gills very narrow, closely crowded. LÆVIPEDES (even-stemmed). Page 120. Stem thin, equal, hollow, naked, smooth—except the base—apparently not striate, but some species are minutely striate under a lens. * Gills broad, lax, usually more or less distant. ** Gills narrow, crowded. _Series B._ GILLS BECOMING GRAY. HYGROPHANOUS. TEPHROPHANÆ. Page —-. Color brownish becoming gray. Allied to the last section of Tricholoma and Clitocybe, but distinguished from them by the cartilaginous stem. Some are strong scented. None known to be edible. STRIÆ´PEDES. * _Gills broad, rather distant._ =C. radica´ta= Relh.—_radix_, a root. (Plate XXIX, p. 112.) =Pileus= 1½-4 in. across, from convex to nearly plane, broadly umbonate, frequently wrinkled toward and at the umbo, glutinous when moist. Color variable, usually brown in grayish shades, from dark to almost white. =Flesh= thin, white, elastic. =Gills= white, thick, tough, distant, ventricose, adnexed, rounded or notched behind like Tricholoma, sometimes with a decurrent tooth. =Stem= 4–8 in. long, 3–5 lines thick, smooth, firm, same color as pileus, tapering upward, becoming vertically striate or grooved, often twisted, ending in a long, tapering, pointed root deeply planted in the earth. =Spores= elliptical, 14–15×8–9µ _Massee_; 11×17µ _W.G.S._; 11×9µ _W.P._; 16–17×10–11µ _B._ Often sombre, but erect, neat and handsome. Growing solitary and in troops in woods, usually near stumps, if much decayed, sometimes on them, or on shaded lawns and grassy places. June to October. Var. _furfu´racea_ Pk. =Stem= furfuraceous, less distinctly striate.