I have quoted the description of this species as it is found in Epicrisis, because the American plant which I have referred to it does not in all respects agree with this description, but comes so near it that it can scarcely be specifically distinct. In the American plant, so far as I have seen it, erect, acute scales are always present, especially on the disk, and the down of the pileus does not always break up into distinct areas or scales. Neither is the stem usually scaly, but rather clothed with soft tomentose or almost silky fibrils. The gills are crowded and some of them are forked. At the furcations there are slight depressions which interrupt the general level of the edges, and give them the appearance of having been eaten by insects. The plant has a slight odor, especially when cut or bruised. _Peck_, 35th Rep. N.Y. State Bot. Remarks under L. acutesquamosa apply to L. Friesii, which Fries himself doubts being distinct from the first. The plants vary greatly in size, color and habitat. The name—acutesquamosa—carries a descriptive meaning with it that L. Friesii does not. It does not appear to have been reported except by Professor Peck, but probably appears as L. acutesquamosa in other lists. The edible qualities are excellent. =L. acutesquamo´sa= Wein.—_acutus_, sharp; _squama_, a scale. =Pileus= fleshy, obtuse, at first hairy-floccose, then bristly with erect, acute, rough scales. =Stem= somewhat stuffed, stout, bulbous, powdered above the moderate-sized ring. =Gills= approximate, lanceolate, simple. _Fries._ =Pileus= convex or nearly plane, obtuse or broadly subumbonate, clothed with a soft tawny or brownish-tawny tomentum, which usually breaks up into imperfect areas or squamæ, rough with erect, acute scales, which are generally larger and more numerous on the disk. =Gills= close, free, white or yellowish. =Stem= equal, hollow or stuffed with webby filaments, subbulbous. =Spores= about 7×3–4µ. Woods and conservatories. Buffalo, _G.W. Clinton_; Albany, _A.F. Chatfield_; Adirondack mountains and Brewertown, _Peck_. The form found in the hot-houses seems to have the tomentum of the pileus less dense and the erect scales more numerous than in the form growing in woods. The annulus is frequently lacerated. In the specimens of the woods the erect scales are sometimes blackish in color, and they then contrast quite conspicuously with the tawny or brownish-tawny tomentum beneath them. They vary in size and shape. Some resemble pointed papillæ, others, being more elongated, are almost spine-like. These are sometimes curved. They are generally larger and more numerous on the disk than elsewhere, and often they are wholly wanting on the margin. _Peck_, 35th Rep. N.Y. State Bot. West Philadelphia, 1897, on lawn and growing from trunk of a maple tree; Mt. Gretna, Pa., mixed woods. _McIlvaine._