Several species of Clitocybe have not been seen or tested by me, nor have I information that these have been tested. ANALYSIS OF TRIBES. _A._ PILEUS FLESHY, OFTEN PALLID WHEN DRY, _not hygrophanous_. Flesh firm, not watery, nor splitting into plates. Those which turn pale in drying differ from Series _B_ by their silky luster. DISCIFORMES (disk-shaped). Page 85. Pileus somewhat equally fleshy; convex then plane or depressed, obtuse, regular; gills at first adnate or regularly adnato-decurrent. Normally solitary. * Pileus gray or brownish. ** Pileus violet or reddish. *** Pileus becoming yellowish. **** Pileus greenish, becoming pale. ***** Pileus white, becoming shining white. Distinguished from white hygrophanous species and white species of Paxillus. DIFFORMES (irregularly shaped). Page 94. Pileus fleshy in the center, thin at the margin, at first umbonate, then expanded and depressed, irregular. Gills unequally decurrent, longer in some places than in others, sometimes rounded on one side of the stem or only reaching it as in Tricholoma. Stem somewhat cartilaginous externally, but fibrous. Cespitose, often grown together at base, variable in form, sometimes solitary. INFUNDIBULIFORMES (funnel-shaped). Page 98. Pileus becoming thin from the fleshy center to the margin, at length funnel-shaped or deeply umbilicately depressed in the center. Stem spongy, externally fibrous. Gills deeply and equally decurrent from the first. Pileus often becoming discolored or pallid, not hygrophanous. * Pileus colored or becoming pale, the surface (at least under a lens) innately flocculose or silky, bibulous, not moist. ** Pileus colored or pallid, smooth, moist in rainy weather. *** Pileus shining whitish, with scattered superficial flocci or becoming smooth. _B._ PILEUS FLESHY-MEMBRANACEOUS. Flesh thin, soft, watery, hygrophanous. CYATHIFORMES (cup-shaped). Page 104. Flesh of pileus thin, consisting of two separable plates, disk not compact, hygrophanous, depressed then cup-shaped; gills at first adnate then decurrent, descending, straight. Color dingy when moist. ORBIFORMES (round-shaped). Page 109. Pileus somewhat fleshy, hygrophanous, convex then flattened or depressed, polished, not squamulose nor mealy; gills plane, horizontal, thin, crowded, adnate or decurrent with a small tooth. Color dingy or becoming watery pale. * Gills becoming ash-colored. Pileus at first dark. ** Gills whitish. Pileus becoming pale. VERSIFORMES (variable in shape). Page 106. Pileus thin, convex then deformed, tough, more or less squamulose or furfuraceous; gills adnate, broad, rather thick, generally distant. Color hygrophanous. * Pileus squalid or brownish with dark squamules. None known to be edible. ** Pileus bright, of one color. _Series A._