44 THE CHICAGO ACADEMY OF SCIENCES 



Mycena haematopa Pers. 



Cespitose. Pileus somewhat fleshy, campanulate, obtuse, the 

 margin denticulate, commonly dark reddish or purplish. 



Lamellae adnate, whitish. 



Stem rigid, white, pulverulent, when broken exuding a dark 

 red juice. 



Pileus 1.3 to 2.5 cm. broad; stem 5 cm. long. 



Old stumps, Glen Ellyn. September, Spores sphaeroid- 

 . ellipsoid, 10 x 6 ft. 



Mycena acicula Schaeff. 



Pileus membranaceous, campanulate or convex, smooth, 

 orange-red, margin striate. 



Lamellae rounded behind, adnexed, ventricose, distant, yellow, 

 becoming whitish at the edge. 



Stem tough, filiform, shining, minutely pilose, pale yellow. 



Pileus 1 to 8 mm. broad; stem 2.5 cm. long. 



On decaying leaves in moist woods. .Glen Ellyn. Pileus 

 paler toward the margin, becoming pale with age; flesh deep 

 orange. Spores pyriform, 9 to 10 x 5 to 6 p. Pileus 2 to 6 mm. 

 broad; stem 2.5 to 5 cm. long. An attractive little species, the 

 bright pileus contrasting with the dull background of leaves so 

 that the plants are readily seen notwithstanding their small size. 



Mycena pura Pers. 



Pileus slightly fleshy at the disk, campanulate then expanded, 

 with an obtuse, even umbo, pinkish, purple or lilac. 



Lamellae broad, adnate, concolorous, interspaces venose. 



Stem firm, smooth, hollow, concolorous. Odor of radish. 



Pileus 1 to 2.5 cm. broad; stem 5 to 7.5 cm. long, 2 to 4 mm. 

 thick. 



Ground in woods. Glen Ellyn. August. Solitary. Whole 

 plant a beautiful heliotrope color when young. 



Mycena epipterygia Scop. 



Pileus campanulate or hemispherical, sometimes convex, 

 striate, viscid, grayish-yellow, the disk brownish. 



Lamellae white or yellowish, sharply uncinate and decurrent- 

 toothed. 



Stem yellow, shining, viscid, white-villous at the base. 



Pileus 4 to 10 mm. broad; stem 2.5 to 5 cm. long. 



Ground in woods, Glencoe. October. 



The pileus in our specimens is mouse-gray with a greenish- 

 yellow tint. The lamellae when old often bscome slightly rufes- 

 cent. The stem is greenish-yellow and viscid when fresh, be- 

 coming pallid or whitish when dry. Pileus 4 to 12 mm. broad; 

 spores broadly ellipsoid, 7 to 9 x 4 to 5 /*. 



None of our plants have the conic pileus shown in some of 

 the specimens figured by Atkinson, in Studies of Am. Fungi, 

 p. 96. 



