The members of this genus possess some of the characters of Boletus. The gills separate easily from the hymenophore as do the tubes of the latter, and their anastomosing tendency is in P. porosus so marked that the hymenium consists of large angular tubes. The gills of P. solidus B. and C. form pores at the base, and its spores are elongated, both features indicating an affinity with Boletus. ANALYSIS OF TRIBES. LEPISTA (a pan). Page 327. Pileus entire, central. Spores dingy-white, in P. panæolus somewhat rust-color. On the ground. TAPINIA (to depress). Page —--. Pileus generally eccentric or resupinate. Spores rust-color. On the ground or on stumps. So far as known the species of this genus are harmless. Many of them are large, fleshy and inviting in appearance, but their flesh is usually dry and coarse, and, though absorbent, is hard to cook tender. P. atrotomentosus, which seems to be rare, is an exception. The flesh of this species being firm in texture and readily made into a first-class dish. LEPIS´TA. =P. lepis´ta= Fr.—_lepista_, a pan. =Pileus= 2–4 in. broad, flat or depressed, dirty-white, smooth, sometimes minutely cracked near the margin which is thin, involute and often undulate. =Stem= very variable in length, 1–4 in., ½-¾ in. thick, dingy white or cream, solid, white inside, equal, with a cartilaginous cuticle passing between the gills and the flesh of the pileus, base blunt, villous, white. =Gills= very decurrent, crowded, 2–3 lines broad, slightly branched but not at the base, dingy-white becoming darker. =Spores= reddish, becoming dingy brown. Broadly pyriforme 6×8µ _Massee_. Pennsylvania. September, 1894. _McIlvaine._ Albion, N.Y., _Dr. Cushing_, 1898. On ground in woods and margins of woods. =Flesh= white. =Gills= narrow, crowded, brittle, decurrent, dingy-white or pale-buff, easily separating from cap. =Stem= solid, elastic, at length hollow, often short, an inch long, tapering downward, frequently up to four inches in length and equal, base villose. Resembling Lactarius piperatus and some forms of Clitocybe. It is separated from the former by the absence of milk and from the latter by its involute margin. The Clitocybe resembling it are all edible. =Smell= strong, like old oily nuts. Edible but coarse. =P. li´vidus= Cke. =Pileus= 1–2 in. across, convex, at length slightly depressed at the disk, margin slightly arched and incurved, dingy-white, or livid ochraceous, opaque. =Gills= decurrent, arcuate, almost crowded, 1½ line broad, white. =Stem= 3–4 in. long, ½ in. thick at the apex, attenuated downward, white, fibrillose, stuffed then hollow, usually rather flexuous. =Flesh= nearly white. =Spores= globose, 3–3.5µ diameter, nearly white.