A dozen or more specimens were found in oak woods near Philadelphia, and carefully tested. Their edible qualities were found to be precisely the same as A. solitaria. *** _Whole volva friable, etc._ =A. rubes´cens= Pers.—_rubesco_, to become red. (Plate VIII, fig. 2, p. 18. Plate XII, fig. 4, p. 32.) =Pileus= about 4 in. broad, dingy-reddish, becoming pale flesh-color, tan, scarcely pure, fleshy, convex, then plane, obtuse, moist but _not glutinous_ in rainy weather and opaque when dry, covered with unequal, soft, mealy, whitish, easily-separating warts, which are smaller, harder and more closely adherent in dry weather; margin even and, when old, slightly striate only in wet weather. =Flesh= commonly soft, white when fresh, _reddening when broken_. =Stem= 4–5 in. long, as much as 1 in. thick, stuffed, somewhat solid, though soft within, conico-attenuated from the thickened base, reddish-_scaled_, becoming red-white, and without a trace of a distinct volva at the base. =Ring= superior, large, membranaceous, soft, striate and white within. =Gills= reaching the stem in an attenuated manner, forming decurrent lines upon it, thin, crowded, soft, as much as ½ in. broad, shining white. Very changeable, but readily distinguished from all others of the same group _by the flesh being reddish when broken_; the stem and pileus are commonly spotted-red when wounded. In dry weather it is firmer, flesh reddening more slowly, warts minute. Odor scarcely any. There is a remarkable variety _circinata_, pileus becoming plane, umber-brown, warts adnate, crowded, roundish. A. circinatus Schum. _Stevenson._ =Spores= spheroid-ellipsoid, 7–8×6µ _K._; 8×6µ _W.G.S._; 7–9×6–8µ _B._; elliptical, 8–9µ long. _Peck._ Not reported west of the Mississippi river. Oak woods, borders and open places. July to September. Indiana, _H.I. Miller_; West Virginia, New Jersey, North Carolina, Pennsylvania, _McIlvaine_. It is quite common, often growing in large patches. Recent authors agree upon the edibility and deliciousness of this species. The author knows it to be one of the most plentiful, useful and delicious, after several years of pleasant experience with it. In July, 1899, at Mt. Gretna, I found, growing from the ground gregariously, a singular fungoid growth from 2–5 in. high; cap hemispherical, 1 in. in diameter, tightly fitting a solid stem of nearly the diameter of the cap. The whole was watery white, and evidently affected by a parasite. It was edible. September 1st Professor Peck wrote to me: “I think I have found the identity of the diseased Agaric, of which you sent me samples some time ago. I mean the one affected by _Hypomyces inæqualis_ Pk. The host is Amanita rubescens, at least sometimes, and probably always.” The plant is very heavy for its size. The lack of a volva, the dingy color and reddish stains distinctly separate this from any poisonous Amanita.