CLASSIFICATION OF A.OARK 



dose woods. Ann Arbor. June and October, hi frequent. 



This differs but little from i/. cyanothrix A.tk. The pileus and 

 stem are slightly gelatinous when moist. The mycelium bai ;i 

 bluish tinge or is 'lull while There is a bluish green tinL'e i" the 

 young pileus which is sometimes slightly zonate. E'eck referred 

 ii to the Rigipedes where ii is somewhal doubtfully retained. 

 I/, cyanothrix Beems to have a much longer rooting stem, adnexed 

 ^ r ills, and the stem is glabrous and differently colored, It ma) 

 turn inn in be identical with \l. cyaneobasis- In Europe three 

 other small Mycenas with blue tints have been described, I/. //"" 

 ginella Fr., I/, iris Berk, and I/, calorhiza Bres., all closely related. 

 Che last, however, has spores very differenl from either of <»m- 



Sectioji \ III. Fragilipedes. Stem fragile, dry, juiceles», 

 scarcely rooting, neither dilated nor inserted. Pileus hygrophan 

 ous. (iills while then tinged grayish or fuscous. 



Delicate, fragile, often soft, usual!// odorous, normally on the 

 ground, debris, leaves, etc., no1 densely caespitose on wood (excepl 

 l/. alkalina ■■ . 



This seci id i. like the preceding, Deeds a revision on a microscopical 

 hasis. especially of those species with nitrous or alkaline odor; the 

 latter have been arranged as well as possible in the absence of 

 detailed information from European sources. We have a number 

 of forms with a more or less nitrous odor, some >»t' which have 

 nut been included below for lack of data. 



856. Mycena alcalina IV. 



Syst. Myc, 1821. 



Illustrations: Pries, [cones, PI. SI, Fig. 3. 

 Cooke, III.. PI. 1ST. 



PILEUS L-2.5 em. broad, campanulate (al ftrel narrowly ovate 

 to conic-campanulate) , obtusely umbonate or <»i»t u>«-. glabrous, 

 hygrophanou8, deeply striate (moist), grayish-brown t>> grayish 

 umber (moist), fading i<» grayish when dry, center always darker. 

 FLESH thin, membranous. GILLS narrowly adnate, arcuate as 

 cending, el<>se to subdistant, whitish then glaucous-gray, or yellow 

 ish in age. STEM ■< ~ em. long, l 2 mm. thick, rigid, fragile, ten 

 or compressed, slippery subgelal inons, hollow, i n n, glabrous, pallid 

 brown, sometimes darker at first, fading, the rooting base white 

 strieose. SPORES 9-10x5-6 micr., broadly elliptical, smooth, ob 



