North American species of Mycena.

380 NORTH AMERICAN SPECIES OF MYCENA

190. MYCENA FLOCCIPES (Fr.) Kiihner
Encyc. Myc., 10:540. 1938
Agaricusfloccipes Fries, Epicr. Syst. Myc., p. 87. 1836.
Collybia floccipes Gillet, Les Hymen., p. 318. 1874.
Mycena atribrunnea Murrill, Mycologia, 8: 220. 1916.
Prunulus atribrunneus Murrill, North Am. Flora, 9: 329. 1916.
Mycena maura R. Maire, Bull. Soc. Myc. Fr., 44: 41. 1928.
Illustrations:
Plate 87 A; Text fig. 46, nos. 1-3, 8.
Kauffman, Agar. Mich., 2, pl. 169 (as Collybia).
Maire, Bull. Soc. Myc. Fr., 44, pl. 2, figs. 12-15, pl. 3, figs. 20-24.
Pileus 3-15 (22) mm. broad, sharply to obtusely conic or somewhat
ovoid when young, becoming campanulate or expanded-umbonate,
margin appressed against the stipe at first or somewhat incurved
(often curved in against the gills in partly expanded pilei), frequently
splitting radially in age, surface glabrous, moist or lubricous, color
"bister" or "snuff brown" when fresh (blackish brown), fading
slowly to nearly "buffy brown" (dull olive brown), or "fawn color"
(with a tinge of vinaceous), opaque at first, striate when fading;,flesh
thin, grayish, moderately cartilaginous, odor and taste not distinctive;
lamellae narrowly adnate-uncinate to nearly free, close to subdistant,
23-30 reach the stipe, moderately broad (3 mm.), but distinctly
ventricose at times, thickish, white, pruinose under a lens from the
large cystidia, edges whitish; stipe 1-7 (10) cm. long, 1-2 (3) mm.
thick, equal, hollow, fragile, somewhat rooting and strigose over the
basal portion, when young covered with a dense minute brown scurfiness, in age polished over all or the apex pruinose, whitish or becoming pure white but in age often sordid yellowish, at least near the
base.
Spores typically subglobose to globose, apiculus usually prominent,
hyaline, smooth, 5-7 u, nonamyloid; basidia four-spored; pleurocystidia and cheilocystidia similar, both abundant, subventricose to
subcylindric, apices obtuse, hyaline, 60-90 X 8-15,, smooth; caulocystidia numerous, at first clavate to ventricose, the apices obtuse,
thin-walled, contents hyaline or sordid brownish, 18-50 X 10-20 ju;
gill trama homogeneous, nonamyloid (merely pale brown in iodine);
pileus trama with a surface layer which in tangential section appears
to be made up of vesiculose cells having a dark-brown content, the
remainder of the flesh homogeneous, of narrower hyphae, a poorly