3g0 THE AGARICACEAE OF MICHIGAN 



333. Cortinarius michiganensis Kauff. (Edible) 

 Jour, of Mycology, Vol. 13. p. 35, 1907 (synopsis). 



PILEUS 8-11 cm. broad, compact, firm, broadly convex then 

 slowly expanded, pale violaceous to lilac, unicolor, color persistent, 

 glabrous, even, glutinous when moist or young, then viscid, margin 

 persistently inrolled and tomentose-silky. FLESH very thick, white 

 or tinged with lilac, not changed by bruising. GILLS rounded 

 behind and adnexed, or almost free, narrow, crowded, thin, acumi- 

 nate in front, pale violaceous-white at first, then pale ashy, finally 

 o< hiaceous-cinnamon, edge serratulatc from the first. STEM stout, 

 3-G cm. long, 18-30 mm. thick, solid, pale violaceous-lilac to whitish, 

 fibrillose from cortina, marginatc-bulbous, bulb large, up to 4 cm. 

 broad, white beneath, flesh white except the violaceous apex. COR- 

 TINA bluish-white, at first attached to the bulb, evanescent, not 

 copious. SPORES narrowly elliptic-ovate, almost smooth, 8-10.5 

 x 4.5-5.5 micr., pale ochraceous-cinnamon in mass. ODOR and 

 TASTE mild. 



Caespitose, in small clusters of large individuals. On the ground, 

 among grass or leaves, in low, rich, frondose woods of beech, maple, 

 etc. Ann Arbor, Detroit, New Richmond. August-October. In- 

 frequent. 



Tli is species is known by its large size, caespitose habit, pale gills 

 of which the spores mature slowly, and by the lilaceous color of 

 cap and stem. When fresh or young a clear gluten covers the 

 pileus and sometimes the base of the young bulb, as if by a universal 

 veil. It is very like C. caesiocyaneus in size and shape, but has a 

 different habit, different color and spores and lacks the white 

 universal veil of that species. It is doubtless in part the C. caerule- 

 scens of some American lists. C. caesius Clem, according to the 

 description, approaches it, differing in its scarcely viscid pileus, the 

 much thicker spores and the white gills. 



334. Cortinarius caesius Clements. 

 Bot. Surv. of Nebraska, IV, 1896. 



'•I' ILEUS 4-8 cm. broad, campanula te-convex, then expanded, 

 fleshy, glabrous, not or scarcely viscid, obscurely dark blue-violace- 

 ous, finally brown-punctate, margin involute. FLESH bluish-gray, 

 unchangeable. GILLS adnate, subdistant, white then cinnamon, not 



