,,,_, THE AGARICACEAE OF MICHIGAN 



651. Amanita frostiana Pk. (Not Poisonous) 



X. V. Si ah- Mus. Rep. 33, 18S0. 



Illustration: Atkinson, Mushrooms, Frontispiece, Fig. 2 (col- 

 ored), 1900. 



PI LEI "S 3-0 cm. broad, convex or expanded, bright orange or 

 yellow, only slightly viscid, decorated with yellowish scales or warty 

 patches, which are sometimes lacking, striate on margin. GILLS 

 free, white or slightly tinged with yellow, close, broadest toward 

 front. STEM 5-8 cm. long, 4-5 mm. thick, white or yellowish, 

 stuffed, bearing a slight, sometimes evanescent annulus, with a 

 distinct bulb which is margined above with a collar-like ring. AN- 

 NULUS superior, thin, fragile. VOLVA floccose-membranous, ad- 

 hering on bulb in concentric scales or prominent rings as in A. mus- 

 curia, but less marked. SPORES globose, 7.5-10 micr., smooth, 

 white, granular within. 



Solitary or few. On very rotten hemlock logs and debris, in 

 hemlock and mixed woods of the northern part of the State. Huron 

 Mountains, Marquette. August-September. Infrequent. 



This species is doubtless most often confused with A. flavocouia 

 which is sometimes of similar size but has a universal veil composed 

 of a powdery yellow substance, and whose bulb has therefore a 

 different appearance. A. frostiana appears more like a small form 

 of I. muscaria and prefers shady conifer woods, while A. flatfoconiv 

 is more common in the southern part of the State in f rondose woods, 

 even in the open. Mcllvaine says it becomes reddish-orange to scar- 

 let farther south and imitates A. caesarea in color; but no confusion 

 should be possible between the two since they have different volvas. 

 .1. frost in mi has globose spores; A. muscaria has oval spores; be- 

 sides the spores, the size seems the only important difference. Ford 

 and Slid rick found it contained no deadly poison. 



652. Amanita cothurnata Atk. (Suspected) 



Studies of Ainer. Fungi, Mushrooms, etc.. 1900. 



Illustrations. II, id. Figs. OS, 09, 70, pp. 07-(',S. 

 Hard, Mushrooms, Fig. 26, p. :!7. 

 PI. CX IX of i his Report. 



PILEUS 3-8 cm. broad, at first globose to hemispherical, then 



