806 THE AGARICACEAE OF MICHIGAN 



859. Mycena leptocephala Fr. 

 Epicrisis, 1836. 

 Illustration: Cooke, 111., PL 187. 



PILEUS 5-20 mm. high and broad, conico-campanulate, scarcely 

 hygrophanous, fuscous-ashy (young and moist) soon grayish-white 

 or buff, obtuse umbo tinged drab, often unicolorous, striate to sub- 

 sulcate when dry and with a glaucous pruinosity, opaque. GILLS 

 ascending, narrowed behind, adnate, not uncinate, not broad, ven- 

 tricose, close to subdistant, whitish, then tinged pale cinereous. 

 STEM 5-10 cm. long, .5-1 mm. thick, filiform, cartilaginous, elastic, 

 glabrous, even, hollow, darker than pileus when dry, whitish above, 

 subrooting. SPORES 8-9.5x5-6 micr. (rarely up to 10 x T micr.)' 

 elliptic-ovate, apiculate and somewhat pointed at one end, smooth, 

 white. CYSTIDIA and sterile cells lacking. BASIDIA short, 

 about 15-18 x 0-7 micr., 4-spored ; sterigmata prominent, 6 micr. long. 

 ODOR nitrous, varying weak or strong. 



Solitary, scattered or rarely subcaespitose, among fallen leaves, 

 mosses, decayed debris on the ground in woods. Ann Arbor, New 

 Richmond. September-October. Not infrequent. 



This is one of the gray Mycenas. It has been placed here 

 because of the glaucous bloom on the cap when dry, referring to 

 the "pruinosity" of Fries' description. No certainty Can be 

 reached in placing it because of lack of detailed data of related 

 European species. It cannot be referred to M. constans Pk. which 

 is a small plant and has a decurrent tooth to the giUs. It might 

 be referred to M. consmilis Cke., but that species is figured with 

 shorter stems, and has no odor. Sometimes the cap and stem have 

 a pale drab or faint purplish tint. The stem becomes flaccid in 

 age, allying it to the Filipedes. The odor is often not noticeable 

 until sometime after the plants have been picked, or when crushed. 



860. Mycena dissiliens Fr. var. 

 Epicrisis, 1836. 



Illustrations: Fries, Icones, PI. 81, Fig. 2. 

 Cooke, 111., PL 285. 



PILEUS 5-15 mm. broad, obtusely convex at first, then campanu- 

 late to subexpanded, subumbonate, striatulate and grayish-brown 



