Agaricaceee 



ANALYSIS OF SPECIESo 



Agaricus. * Gills at first or very soon pink or rosy. 

 ** Gills at first brownish or gray. 

 *** Gills .at first white or whitish. 



* Gills at first or very soon pink or rosy. 



A. campes'ter Lltm. campus, a field. (Plate XCI, fig. 4 (3 figs.) 

 fig. 5, section, p. 332). Pileus at first hemispherical or convex, then 

 expanded with decurved margin or nearly plane, smooth, silky floccose or 

 hairy squamulose, the margin extending beyond the lamellae, the flesh 

 rather thick, firm, white. Lamellae free, close, ventricose, at first deli- 

 cate pink or flesh color, then blackish-brown, subde liquescent. Stem 

 equal or slightly thickened toward the base, stuffed, white or whitish, 

 nearly or quite smooth. Ring at or near the middle, more or less lacer- 

 ated, sometimes evanescent. Spores elliptical, 6-8x4-5/1. 



Plant 2-4 in. high. Pileus 1.5-4 m - or more broad. Stem 4-8 

 lines thick. Peck, 36th Rep. N. Y. State Bot. 



Spores spheroid-ellipsoid, 9x6yu. K.; 6x8fi W.G.S. 



The varieties of A. campester are numerous. All of them are edible 

 and vary but slightly in their excellence. 



Var. at bus Berk. albus, white. A very common wild form. Cap 

 2-4 in. across, smooth or slightly fibrillose. Stem 1^-3 in. long, 

 K % in. thick, white or whitish. Spring to autumn, in rich grassy 

 places. Sometimes very large. It is cultivated. 



Var. griseus Pk. griseus, gray. Cap grayish, silky, shining. Ring 

 vanishing. Reported from Virginia. 



Var. prati'cola Vitt. pratum, a meadow; colo, to inhabit. Meadow 

 variety. Cap covered with reddish scales. Flesh pinkish. Parade 

 ground, Mt. Gretna, Pa. 



Var. umbri'mts Vitt. umber, dark brown. Cap brown, smooth. 

 Stem short, minutely scaly. 



"Var. rufes'cens Berk. rufescens, becoming red. Pileus reddish, 

 minutely scaly. Gills at first white. Stem elongated. Flesh turning 

 bright red when cut or bruised. This departs so decidedly from the 

 ordinary characters Qf the type, especially in the white color of the 

 young gills, that it seems to merit separation as a distinct species. ' ' Peck, 

 36th Rep. 



332 



