338 THE AGARICACEAE OF MICHIGAN 



Section I. Universal veil present. 



*Gills, flesh or stem at first violaceous, bluish, or purplish, rarely 

 olivaceous or white. 



319. Cortinarius atkinsonianus Kauff. (Edible) 

 Bull. Torr. Bot. Club, Vol. 32, p. 324, 1905. 



Illustrations: Ibid, Fig. 6, p. 316. 



Jour, of Mycol., Vol. 13, Plate 99, p. 3G, 1907. 

 Plate LXVII of this Report. 



PILEUS 6-9 cm. broad, convex then expanded, wax-yellow or 

 flavus at first, tinted with olivaceous, then alutaceous or reddish- 

 tawny in places, with- a viscid separable pellicle, glabrous, even. 

 FLESH thick, rather soft, at first deep violet or lavender, slowly fad- 

 ing. GILLS adnate becoming slightly sinuate, rather narrow, width 

 uniform, deep violet or purplish at first, edge sometimes olivaceous- 

 yt-llowish, at length cinnamon. STEM G-8 cm. long, stout, 12-18 mm. 

 thick, deep violet or violaceous blue, concolor within, solid, dry, equal 

 or tapering upward from a rather thick, marginate, broadly tur- 

 binate bulb up to 3 cm. thick, and externally clothed by the oli- 

 vaceous-yellow universal veil, apex of stem fibrillose, elsewhere hung 

 with the fibrillose remains of the olivaceous-yellow cortiua. 

 SPOKES almond-shaped, elliptical, very tuberculate, 13-15 (rarely 

 16) x 7-8.5 micr., rusty-cinnamon in mass. 



Gregarious. In leaf -mould or among fallen leaves, in rich,. mixed 

 or frondose woods. Ann Arbor, Detroit, New Richmond. Septem- 

 ber-October. Infrequent. 



This noble species is the prince of known American Cortinarii. 

 Several collections in all stages of development have made it possible 

 to emend the original description and refer it to its proper place in 

 the genus. The colors of the fresh plants are vivid and most beau- 

 tiful. The llcsh is at first intense violet, and by peeling the pileus 

 this color is at once exposed under the yellow pellicle. There is an 

 olivaceous tinge in the yellow color of the pileus, cortina and uni- 

 versal veil in the young plant, and the edge of the gills may also 

 be laved with the olivaceous-yellow coloring. The taste and odor are 

 mild. It seems closely related to C. arquatus Fr. in the sense of 

 Ricken, from which it differs mainly in its intensely violet or pur- 

 plish flesh. The figure of Ricken (Blatterpilze, PL 36, Fig. 4) how- 



