NATURAL HISTORY SURVEY 25 



equal or attenuated upwards, slightly firm, greaved at the base by 

 the separable volva which has an entire or obtuse margin. 



Pileus 10 cm. broad; stem 7.5 to 10 cm. high, 1 to 1.5 cm. 

 thick. 



Ground in woods, Glen Ellyn. August. Spores in our plants 

 broadly elliptical, 8 to 9 x 5 to 6 ft. 



Amanita abrupta Pk. 



Pileus thin, broadly convex or nearly plane, covered with 

 small angular or pyramidal, erect, somewhat evanescent warts, 

 white, slightly striate on the margin; flesh white. 



Lamellae moderately close, reaching the stem and sometimes 

 terminating in slightly decurrent lines upon it, white. 



Stem slender, glabrous, solid, bulbous, white, the bulb abrupt, 

 subglobose, often coated below by the white persistent mycelium ; 

 the ring membranous, persistent. Spores broadly elliptical or 

 subglobose, 8 to 10 x 6 to 8 /A. 



Pileus 5 to 10 cm. broad; stem 6 to 10 cm. long, 6 to 8 mm. 

 thick. 



Woods, Winfiekl. August. The small, pyramidal warts are 

 more numerous toward the center of the pileus. The volva wholly 

 disappears. The globose bulb in our specimens is 2.5 cm. or more 

 in diameter. 



Amanita rubescens Fr. 



Pileus warty, even, but slightly striate on the margin, more or 

 less tinged with dingy-red or brownish-red. 



Lamellae white or whitish, narrowed behind. 



Stem equal or slightly tapering upwards, squamulose, stuffed 

 or hollow, thickened or bulbous at the base, slightly striate at 

 the top, annulate, whitish or pallid; flesh becoming reddish when 

 wounded. 



Spores elliptical, 7.5 to 9 x 5 to 6 /*. Pileus 7.5 to 10 cm. 

 broad; stem 10 to 15 cm. high, 8 to 12 mm. thick. The volva is 

 wholly friable, and often disappears from the base of the stem or 

 bulb. 



Woods, throughout, but not common. Gregarious, occasion- 

 ally somewhat caespitose. Sometimes very large. Plants were 

 found in woods at Glen Ellyn and Winfield, in 1902, with the 

 pileus measuring 17 cm. or more in width, and with the stem 3 

 cm. thick. One specimen had the lamellae abortive and stem 

 torn into large scales. Another consisted only of a somewhat 

 flattened, obconic stem, 15 cm. long, 20 cm. in circumference, 

 the pileus reduced to a mere border and gills wholly wanting. 



AMANITOPSIS. 



Plants with a volva but no annulus; hymenophore distinct 

 from the fleshy stem; lamellae free or adnexed. All growing on 

 the ground. Spores white. 



