Porphyrosporse 



A. fc^dera'tllS Berk, and Mont. confederated. Pileus fTeshy, thin, Agaricus. 

 at first ovoid then bell-shaped, finally convex, somewhat umbilicate 

 with the center slightly depressed, margin hanging down (when dry 

 involute), fragments of the veil hanging from the margin, tawny, scaly 

 with minute, scattered, white, persistent granules, 2-3 in. broad, % \% 

 in. high. 



Stem stout, hollow, stuffed with fibers, gradually increasing in size 

 to the base; below the ring rough from the ruptured bark, 4 in, high. 

 Ring superior, broad, reflexed, torn, persistent. Gills linear, medium 

 broad, at first pinkish-lilac, when adult brownish, edge white, pulveru- 

 lent, adnate, gradually attenuated toward the margin. Spores dingy- 

 brown, ovoid oblong, io/x long. Somewhat cespitose. Elegant. 



On the ground in pastures. July. Columbus, Ohio. Sullivant, 

 Mont. Syll., p. 121. 



Edibility not reported. I have not seen this species. 



A. xylo'genus Mont. Gr. produced on wood. Pileus membrana- 

 ceous, at first ovoid, then conical, bell-shaped, umbonate, finally con- 

 vexo-plane, smooth, pale-yellow, center brownish, margin split, striate 

 when dry, i/^ 2/ in. broad, iK in. high. Stem cartilaginous, white, 

 3 in. high, K in. thick, gradually thickened toward the base, hollow. 

 Ring of medium size, inferior, erect or reflexed. Gills free, remote, 

 lance-shaped, rounded behind, attenuated toward the margin, pink as 

 in A. campester. Spores spherical, colorless, hyaline, S~7-Sl J -- 



On dead wood. August. Columbus, Ohio. Sullivant. Mont. Syll., 

 p. 122. 



Edibility not reported. I have not seen this species. 



** Gills at first brownish or gray. 



A. argen'teus Braendle of silver. Pileus thin, convex becoming 

 nearly plane, slightly silky or glabrous, pale grayish- white or grayish 

 brown, shining with a silvery luster when dry, the margin sometimes 

 striate, at first incurved, often revolute when old. Flesh whitish, 

 becoming blackish where cut. Lamellae close, free, at first brownish 

 becoming blackish brown or black with age. Stem short, glabrous, 

 solid, often narrowed toward the base, the annulus slight, evanescent. 

 Spores broadly elliptic, 7-iOft long, 6/x, broad. 



339 



