Refokt of the Botanist. 97 



The species of this subgenus are easily recognized, though 

 not always easily distinguished from each other. The pileus 

 is generally white or yellowish, the lainella3 at length brown 

 or blackish, and the stipe generally rather stout, fleshy and 

 annulate. 



Synopsis or the Species. 



Stem hollovr or stuffed '•^■ 



a. Pileus thick, fleshy ; stem stout ^^ 



b. Stem not bulbous OO- 



b. Stem bulbous SI- 



a. Pileus thin ; stem slender c. 



c. Stem hollow ^^■ 



c Stem stuffed with a pith O-J- 



Stem solid, scaly 9'-. 



Stem solid, smooth 9<'» 



* 90. Agakicus campestkis L. 



Pileus thick, fleshy, convex, smooth or slightly silky, white, 

 the margin surpassing the gills ; lamellcB close, rounded, free, 

 bright flesh-colored, then blackish-brown ; stipe short, stout, 

 white, stuff'ed, annulate, not bulbous ; annulus white, single. 



Height about 2', breadth of pileus l'-3', stipe 4"- 6" thick. 



r^rassy ground in fields. Albany. September. 



Not abundant. Edible. This is the species commonly 

 cultivated, and generally know by the indehnite term Mush- 

 room. 



91. Agaeicus Silvicola Vitt. 



Pileus fleshy, campanulate, becoming convex, smooth, 

 white or yellowish, the margin scarcely exceeding the gills 

 and often purplish- stained ; lamellae whitish, then pinkish 

 brown, narrower toward either end, rounded and free ; stipe 

 rather long, stout, stuffed or hollow, bulbous, annulate, white ; 

 anuulus thick, double, the outer part often splitting into 

 rays. 



Height 4'- 6', breadth of pileus 3'- 5'. 



Ground in pine woods. West Albany. October. 



This species is sometimes called a variety of A. campestris / 

 but it appears to me to be clearly distinct. The bulb of the 

 stem is flattened. The exterior of the annulus is sometimes 

 stained with yellow, and the pileus becomes more yellow by 

 bruisino;. 



t)2. AgARICUS HoElSTEMAi^NI Fr. 



Pileus fleshy, convex, becoming expanded, smooth, viscid 

 when moist, pale yellow ; lamellae moderately broad, attached, 

 [Assem. N^o. 133.] 13 



