32 THE CHICAGO ACADEMY OF SCIENCES 







Tricholoma Russula Schaeff. 



Pileus fleshy, convex, becoming plane or centrally depressed, 

 viscid, even or dotted with granular squamules on the disk, rosy- 

 red; flesh white, taste mild. 



Lamellae subdecurrent, white. 

 Stem solid, firm, rosy, apex squamulose. 



Pileus 7 to 12 cm. broad; stem 2.5 to 5 cm. long, 12 to 16 mm. 

 thick. 



Near Warrenville, October. The interior of the stem is wholly 

 fibrous, the fibers at the apex being diffused into the flesh of the 

 pileus. 

 Tricholoma columbetta Fr. 



Wholly shining white. Pileus fleshy, firm, convex, obtuse, 

 flexuous, dry, at first smooth, then silky-fibrillose and becoming 

 even or squamulose, the margin, which is inflexed when young, 

 tomentose. 



Lamellae somew r hat emarginate, almost free, linear, persistent- 

 ly shining white. 



Stem short or long, solid, wholly fleshy and compact, com- 

 monly unequal. 



Pileus -5 to 10 cm. broad; stem 7.5 to 10 cm. long, up to 2.5 

 cm. thick. 



On the ground among dead leaves. Winfield and Glen Ellyn. 

 October. Stems occasionally up to 15 cm. long, very irregular. 

 Spores variable in size, ellipsoid, 6 to 8 x 3 to 5 p. 

 Tricholoma terreum Schaeff. 



Pileus fleshy, thin, soft, convex, campanulate or nearly plane, 

 obtuse or umbonate, innately fibrillose or floccose-squamose, 

 cinereous-fuscous, grayish-brown or mouse-color; flesh white or 

 whitish. 



Lamellae adnexed, subdistant, more or less eroded on the edge, 

 white becoming cinereous. 



Stem equal, varying from solid to stuffed or hollow, fibrillose, 

 white or whitish. 



Spores broadly elliptical, 6 to 7 x 4 to 5 /x. Pileus 2.5 to 7.5 

 cm. broad; stem 2.5 to 5 cm. long, 4 to 8 mm. thick. September 

 to November. 



Rotten stump, Naperville, May. Pepoon. 

 Tricholoma imbricatum Fr. 



Pileus fleshy, compact, convex or nearly plane, obtuse, dry, 

 innately squamulose, fibrillose toward the margin, brown or 

 reddish-brown, the margin thin, at first slightly inflexed and 

 pubescent then naked; flesh firm, white. 



Lamellae slightly emarginate, almost adnate, rather close, 

 white when young, becoming reddish or spotted. 



Stem solid, firm, nearly equal, fibrillose, white and mealy or 

 pulverulent at the top, elsewhere colored like the pileus. 



Spores 6 x 4 to 5 /x. Pileus 5 to 10 cm. broad; stem 5 to 7. 5 

 cm. long, 8 to 16 mm. thick. 



