6 20 THE AGARICACEAE OF MICHIGAN 



yellow-pulverulent at first adhering to bulb as small, chrome-yellow, 

 pulverulent masses. SPORES oval, 0-9x4-5 micr., white, smooth-. 



Solitary or scattered. In low, conifer or frondose woods, among 

 decayed debris, on mosses, etc. Throughout the State : Ann Arbor, 

 Detroit, Palmyra, New Richmond, Bay View, Munising, Marquette, 

 Houghton. July-September. Common. 



In the even margin of the pileus and the powdery volva it differs 

 from A. frostiana which it resembles most, and from small forms 

 of A. muscaria. It is about the same size as A. frostiana, sometimes 

 larger, and is often erroneously referred to it. With us, A. frostiana 

 occurs only in the conifer regions of the State. A. flavoconia occurs 

 annually on a bed of Polytrichum commune bordering a small lake 

 north of Ann Arbor. It is our commonest, small yellow Amanita 

 and like A. muscaria, is widely distributed. The bulb does not be- 

 come reddish when bruised as in A. flavor ubescens. 



660. Amanita spissa Fr. (Deadly Poisonous) 

 Epicrisis, 2836-38. 



Illustrations: Cooke, 111., PI. G9. 



Gillet, Champignons de France, No. 3 (as A. amply) and No. 



19. 

 Bresadola, Fungh. inang. e. vel., PI. 7. 

 Ricken, Blatterpilze, PL 80, Fig. 2. 

 Plate CXXIV of this Report. 



PILEUS 0-10 cm. broad, convex then campanulate-expanded, 

 obtuse, subviseid when moist, shining when dry, gray with brown 

 or sooty-brown disk, covered by small, angular, floccose or pulveru- 

 lent, soft grayish scales or warts, glabrescent, margin not striate. 

 FLESH rather thin, white. GILLS free but reaching the stem and 

 decurrent by a line, medium broad, crowded, shining white, ob- 

 scurely flocculose on edge. STEM 8-12 cm. long, 1 cm. or more 

 thick, stuffed by a pith, firm, tapering upward, white or grayish. 

 pruinose above, the ring, the clavate or globose bulb, and sometimes 

 the stem above the bulb, covered at first by loose, gray floccose 

 masses. ANNULUS membranous, apical, pendant, entire, white or 

 tinged gray below. VOLVA pulverulent, floccose, evanescent, gray. 

 SPORES broadly elliptical, obtuse, 7-9x0 micr., smooth, white. 

 STERILE CELLS on edge of gills inflated-pyriform or globose on 

 a slender stalk. ODOR mild. 



