Agaricaceae 



Agaricus. Lafayette B. Mendel, in American Journal of Physiology, March, 

 1898, gives the following analysis of A. campester: 



Two varieties of the common mushroom were collected in New Ha- 

 ven. Fifteen specimens of one variety weighed i% ounce, an average 

 weight of 43 grains each. The analysis gave : 



a. b. 



Water 87.88$ 92.20$ 



Total solids 12.12 7.80 



Total nitrogen in dry substance 4.42 4.92 



Ash in dry substance n.66 17.18 



A. COmp'tulllS Fr. comptus, gaily adorned. PileilS i-i / in. broad, 

 yellowish-white, slightly fleshy, convex then plane, obtuse, adpressedly 

 fibrilloso-silky , becoming even. Flesh thin, soft, of the same color as 

 the pileus. Stem 2 in. long, 2-3 lines thick, hollow, stuffed with floc- 

 cules when young, somewhat attenuated, even, smooth, white, becoming 

 somewhat light yellow. Ring medial, torn, fugacious, of the same 

 color. Gills rounded-free behind, crowded, soft, broader in front, 

 flesh-color then rose, not dingy-flesh-color except when old. 



Closely allied to A. campestris, but constantly distinct in its more 

 beautifully colored gills. Fries. 



Cultivated ground. Menands. August. Peck, Rep. 41. 



Closely allied to A. campestris, from which it may be separated by 

 its smaller size, the yellowish hue of the dry plant and by the smaller 

 spores. Peck, 4ist Rep. N. Y. State Bot.. 



Mt. Gretna, Pa. Parade ground, with A. campester; Haddonfield, 

 N. J. August to frost. Mcllvaine. 



A. comptulus appears frequently in the latitude of Philadelphia. It 

 is a neat species, but not substantial in flesh. Here it usually grows 

 close to the ground. The ring is very evanescent. 



Its edible qualities are those of A. campester. 



A. Sllvat'icus Schaeff. belonging to woods. Pileus thin, at first 

 convex or bell-shaped, then expanded, gibbous or subumbonate, fibril- 

 lose or variegated with a few thin tawny brownish or reddish-brown 

 spot-like adpressed scales, whitish, brownish or smoky-gray, the disk 

 sometimes tinged with red or reddish-brown, the flesh white or faintly 

 reddish. Lamellae thin, close, free, narrowed toward each end, red- 



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