=C. acerva´ta= Fr.—_acervus_, a heap. =Pileus= fleshy but thin, convex or nearly plane, obtuse, glabrous, hygrophanous, pale tan-color or dingy pinkish-red and commonly striatulate on the margin when moist, paler or whitish when dry. =Gills= narrow, close, adnexed or free, whitish or tinged with flesh-color. =Stem= slender, rigid, hollow, glabrous, reddish, reddish-brown or brown, often whitish at the top, especially when young, commonly with a white matted down at the base. =Spores= elliptical, 6×3–4µ. =Plant= cespitose. =Pileus= 1–2 in. broad. =Stem= 2–3 in. long, about 1 line thick. Decaying wood and ground among fallen leaves in woods. Adirondack mountains. August and September. _Peck_, 49th Rep. N.Y. State Bot. This very pretty plant resembles forms of C. dryophila. The coloring of the stems is often extremely delicate, like paintings upon rice paper. West Virginia mountains; Eagle’s Mere, Pa. August to frost. _McIlvaine._ The entire plant is tender, delicate and of fine flavor. In these qualities it is not distinguishable when cooked from the smaller forms of C. dryophila. [Illustration] MYCE´NA Fr. _Gr._—a fungus. (Plate XXXII.) [Illustration: MYCENA GALERICULATA.] =Pileus= regular, rarely depressed in the center, thin, usually streaked with longitudinal lines, at first conico-cylindrical, _margin at the first straight_, closely embracing the stem which is attenuated upward. =Stem= hollow, slender, cartilaginous. =Gills= adnate or adnexed, sometimes with a small tooth, never decurrent. =Spores= white. Generally small and slender, growing on branches, twigs, heaps of leaves, sometimes on the ground, some minute species on single dead leaves. Long, rooting stems are not uncommon. Clitocybe and Omphalia are separated by their decurrent gills and in Collybia the margin is at first incurved. In this genus the species of the various sections are not always distinguished by single sharply defined characteristics, so that it will sometimes be necessary to pay attention to all the features. Species with a thread-like stem are found in other sections than Filipedes and some of the Lactipedes are slippery when moist, but not truly viscous. ANALYSIS OF TRIBES. CALODONTES (_kalos_, beautiful; _odontes_, teeth). Page 126. Stem juiceless, not dilated into a disk at the base. Edges of gills darker, minutely toothed. ADONIDEÆ (_Adonis_, referring to beauty). Page 126. Stem juiceless, not dilated at the base. Gills of one color, not changing color. Color pure-colored, bright, not becoming brownish or gray. On the ground. RIGIPEDES (rigid-stemmed). Page 126. Stem firm, rigid, rather tough, juiceless, more or less rooting. Gills changing color, white, then gray or reddish, generally at length connected by veins.