=P. muta´bilis= Schaeff.—changeable. =Pileus= about 2 in. broad, cinnamon when moist, becoming pale when dry, hygrophanous, slightly fleshy, convex then flattened, commonly obtusely umbonate, sometimes depressed, even and _smooth_, but when young occasionally scaly throughout. =Stem= about 2–3 in. long, 2 lines and more thick, _rigid_, stuffed then hollow, equal or attenuated downward, _scaly-rough as far as the ring, rust-color, blackish_ or umber _downward_, often ascending or twisted. =Ring= membranaceous, externally scaly. =Gills= _adnato-decurrent_, crowded, rather broad, pallid then cinnamon. _Stevenson._ Densely cespitose, variable in stature. =Spores= ellipsoid-obovate, 6×11µ _W.G.S._; 7×4µ _W.P_; 9–11×5–6µ _Massee_; 11×7µ _Morgan_. Edible. _Curtis._ Considered excellent in Europe. =P. margina´ta= Batsch.—_marginatus_, margined. =Pileus= 1 in. and more broad, honey-colored when moist, tan when dry, hygrophanous, slightly fleshy, convex then expanded, obtuse, even, _smooth_, margin striate. =Stem= about 2 in. long, 1–2 lines thick, _tubed_, equal, _fibrillose_ or slightly striate, _not scaly, of the same color as the pileus_, but becoming dingy-brown, and _commonly white velvety at the base_. =Ring= 1–2 lines distant from the apex, often in the form of a cortina and fugacious. =Gills= _adnate_, crowded, thin, _narrow_, at first pallid, then darker cinnamon. It varies much, and is deceptive on account of the vanishing veil. In hedges there is a very small cespitose form with the pileus only ½ in. broad, and the stem tough and smooth, with exception of the remains of the fugacious cortina. There also occur on the ground among mosses smaller and paler forms, which must be carefully distinguished from A. unicolor, etc. _Stevenson._ =Spores= 7–8×4µ _Massee_. Haddonfield, N.J., November, December, 1896. In pine woods. _McIlvaine._ The caps of this small Pholiota, seldom over 1 ½ in. across, can be gathered in goodly numbers where it frequents. They are of excellent quality. =P. dis´color= Pk.—changing color. =Pileus= thin, convex, then expanded or slightly depressed, smooth, viscid, hygrophanous, watery-cinnamon and striatulate on the margin when moist; bright ochraceous-yellow when dry. =Lamellæ= close, narrow, pallid then pale rust-color. =Stem= equal, hollow, fibrillose-striate, pallid. =Ring= distinct, persistent. =Spores= elliptical, 7×5µ. =Plant= subcespitose, 2–3 in. high. =Pileus= 8–16 lines broad. =Stem= 1 line thick. Old logs in woods. Greig. September. The change of color from the moist to the dry state is very marked. This species resembles Agaricus autumnalis, in which the annulus is fugacious and the spores are longer. The edge of the gills in both is white-flocculose. _Peck_, 25th Rep. N.Y. State Bot.