North American species of Mycena.

256 NORTH AMERICAN SPECIES OF MYCENA

conifers or in mixed conifer and hardwood forests, summer and fall;
New York and Michigan in the United States and Nova Scotia and
Manitoba in Canada.
Material studied.-Smith, 33-373, 551, 1315, 1356, 1746, 3975,
6054, 6299, 6968. Atkinson, 22677. Bisby, July 28, 1935. Wehmeyer, 551.
Observations.-When the pileus fades it often assumes a glistening
or silvery-streaked appearance which may cause it to appear silky
to the naked eye. The consistently very dark color is a constant
feature of this species, as is also the strict appearance. Small forms
which appear bluish because of their glaucous coating may lead one
to confuse M. atrocyanea with M. urania. A microscopic examination will readily separate the two since their cystidia are very different.
119. MYCENA PRAELONGA (Pk.) Saccardo
Syll. Fung., 5: 282. 1887
Agaricus (Mycena) praelongus Peck, Ann. Rep. New York State Cab., 23:
81. 1872.
Prunulus praelongus Murrill, North Am. Flora, 9: 330. 1916.
Illustrations: Plate 40 A; Text fig. 31, nos. 1-2.
Pileus 5-15 (20) mm. broad, obtusely conic at first, the margin
appressed or bent in slightly, becoming obtusely campanulate to
plane with an abrupt sharp or obtuse umbo, surface hoary but soon
polished and naked, glabrous, near "bone brown" when fresh or even
more blackish, becoming paler grayish brown ("hair brown" to "pale
drab gray") in age, the margin sometimes pallid; flesh thin, sordid
grayish brown, rather cartilaginous, pliant, odor and taste not distinctive; lamellae subdistant, narrow, adnate or toothed, pallid gray,
sometimes stained sordid reddish brown, pallid or whitish along the
edges; stipe 8-16 (20) cm. long, 1-1.5 (2) mm. thick, equal, tubular,
straight or flexuous, terete, cartilaginous, base sometimes whitestrigose, glabrous above, the apex sometimes pruinose at first, concolorous with the pileus or paler, especially above, in age sometimes
spotted sordid reddish brown near the base.
Spores 8-9 (10) X 5-6 A, broadly ellipsoid, amyloid; basidia fourspored; pleurocystidia rare to scattered, similar to the cheilocystidia,
cheilocystidia abundant, 30-62 X 8-12 (14) A, fusoid-ventricose with
acute to subacute apices; gill trama of enlarged cells and scattered