North American species of Mycena.

EUMYCENA: OMPHALIARIAE

369

differs from typical material chiefly in the more lubricous pileus and
stipe and the lack of the strong odor and taste. It differs from M.
pusilla in having a thinner pellicle of the cap and a distinct hypoderm.
Its more arcuate gills and smaller spores are additional distinguishing
characters. Because of the difference in the structure of the cap I
doubt whether var. subviscida is truly related to M. pusilla, and so
have retained it here.
182. Mycena misera (Fr.), comb. nov.
Agaricus (Collybia) misera Fries, Monogr. Hymen., p. 290. 1863.
Collybia misera Gillet, Les Hymen., p. 309. 1874.? Mycena pseudo-picta Lange, Dansk Bot. Arkiv, 6 (5): 15. 1930.
Illustrations:
Plate 87 C; Text fig. 43, nos. 7-8 (p. 349).
Bresadola, Icon. Mycol., 5, pl. 207, fig. 2.
Fries, Icon. Sel. Hymen., 1, pl. 70, fig. 4.
Smith, Pap. Mich. Acad. Sci., Arts, and Letters, 19, pl. 38, fig. 1.
Pileus 4-10 (15) mm. broad, very obtuse to convex at first and
with an incurved margin, usually with a broad umbo at maturity,
sometimes nearly plane, surface conspicuously pruinose at first, becoming naked and lubricous, evenly fuscous over all (beneath the
pruina), the disc remaining fuscous, the margin becoming drab or
with a more brownish cast, subhygrophanous, faintly striate when
moist, fading to sordid cinereous and becoming opaque; flesh thin,
sordid fuscous, fairly cartilaginous, taste slightly farinaceous, no odor;
lamellae distant to subdistant, broad, adnate or arcuate-adnate,
sometimes short-decurrent, drab but with a pallid sheen, edges
minutely eroded and concolorous with the faces; stipe 1-3 cm. long,
1-1.5 mm. thick, equal, tubular, cartilaginous, concolorous with the
pileus, pruinose over all at first, apex somewhat furfuraceous, base
hardly strigose and tending to stain brownish in age.
Spores (7) 8.5-10 X 4-5.5 i, ellipsoid, amyloid, basidia fourspored; pleurocystidia not differentiated; cheilocystidia embedded
and inconspicuous, clavate to subcapitate or irregular in outline,
26-34 X 7-12 j, the upper portion bearing numerous rodlike projections, which become elongated, contorted, and sometimes branched
in age; gill trama homogeneous, very dark sordid brown in iodine;
pileus trama with a thin nongelatinous pellicle, the hyphae of which
bear numerous short projections, hypoderm well differentiated, the
remainder of filamentous hyphae.