,;il THE AGARICACEAE OF MICHIGAN. 



Differs from I. cothurnata in its bulb and annulus characters, 

 ;ni(l in its elliptical spores. The scales of the stem are due to its 

 1 1 hii surface and point upward. The floccose structure of the uni- 

 versal veil and its manner of breaking separates it from A. verna, A. 

 phalloides and A. virosa. The yellow floccules on the annulus are 

 a character peculiar to this species. A. crenulata differs from A. 

 chrysoblema in its very evanescent volva, in its gills which reach 

 ihc stem and have a strongly iioccose edge, the floccules of which 

 are sometimes yellow, and in its nucleate spores. 



654. Amanita solitaria Fr. (Edible, but use caution) 

 S.vsi. Myc, 1821. 



Illustrations: Atkinson, Mushrooms, PL 21 and 22, 1000. 



(Jillet, Champignons de France, No. 16 (as A. pellita), No. 8 



(as A. echinocephala). 

 -Cooke, 111., PL 039. 

 Var. (A) (A. strobiliformis) r? 



PILETJS 10-15 cm. broad, globose-hemispherical at first, finally 

 expanded-plane, at an carl// stage covered by large, firmly adhering, 

 pyramidal warts, when expanded dotted with floccose, rather soft, 

 brownish warts, not striate, whitish. FLESH white. GILLS free 

 or almost so, crowded, narrow, white or tinged cream-color, edge 

 entire STEM 10-15 cm. or more in length, solid, rooting napiform- 

 bulbous at first, then elongated and 1-2 cm. thick, the thick bulb at 

 the first concentrically corrugated by thick, pointed warts, when 

 full grown oval ending below in a large, tapering "root" 

 which penetrates the soil deeply, the bulb then covered with 

 smaller, scattered warts, becoming almost glabrous upward to the 

 ring, whitish. ANNULUS pendant, apical, white then dingy yellow- 

 ish and disappearing. SPORES variable in shape, 0-12 x (\-7.r> niicr., 

 elliptical, smooth, white. ODOR none at any stage. 



Solitary on the ground in low woods of maple, oak, etc. Ann 

 Arbor. August. Infrequent. 



The spore-measurements agree with the spore-measurements 

 by Bresadola, but not at all with his figure (Fungh. 

 -Man-, et. vel., PL 8), which shows the surface of the stem torn-scaly 

 like the surface of an open pine cone. It is more like the forms 

 photographed by Atkinson (Mushrooms, PL 21, 1900), except for 

 the more napiform bulb and larger spores. Authors disagree widely 



