North American species of Mycena.

EUMYCENA: TYPICAE

263

glabrous, subconcolorous below, white above, 4-5 cm. long, 0.5 mm.
thick.
"Type collected on fallen dead wood in a wet thicket at New
Orleans, Louisiana, September 8, 1908, F. S. Earle 126 (herb. N. Y.
Bot. Gard.)."
Distribution.-Louisiana and possibly Tennessee.
Material studied.-Earle, 126. Hesler, 6519.
Observations.-An examination of the type revealed that the
spores were hyaline, smooth, narrowly ellipsoid, 7-9 X 3.5-4.5 g,
and weakly amyloid. The basidia were four-spored. The pleurocystidia and cheilocystidia, which were similar, were numerous,
smooth, 36-48 X 6-11 A, hyaline, subfusoid, and with a homogeneous
content. The gill trama was not distinctive beyond being yellowish
in iodine. The pileus trama possessed a well-developed nongelatinous
pellicle, the hyphae of which gave off numerous short rodlike projections. The hypoderm was well differentiated, the large cells being
filled with a smoky-brown content. The remaining portion was made
up of narrow filamentous interwoven hyphae. All parts were yellowish in iodine.
In stature the dried specimens somewhat resemble those of M.
debilis, but the resemblance is only superficial. Hesler's notes on the
Tennessee collection follow:
"Pileus 8-15 mm. in diameter, convex-campanulate, obtusely
umbonate, grayish-brown, umbo dark brown, sulcate, not viscid,
glabrous. Flesh whitish, membranous. Gills adnate then uncinate,
white and remaining white, subdistant, intervenose, alternately long
and short, edge white-fimbriate. Stipe 6-7.5 cm. X 0.5-1.0 mm.,
hollow, apex white and pruinose, darker below, livid at the base,
which is white-strigose, often twisted, not viscid. Spores variable:
some 9-9.5 X 4.5-5.5,; others 4 X 3 u; apiculate, elliptical. Cystidia lanceolate, base enlarged, extending 35-40 p beyond the hymenium; about 50-55 X 9.5 (base), 3.2, (apex). Odor and taste none."
SPECIES WITH MORE OR LESS ROUGHENED
CYSTIDIA; GREGARIOUS
124. MYCENA LATIFOLIA (Pk.) Saccardo
'*: ~ ~ Syll. Fung., 5: 268. 1887
Agaricus latifolius Peck, Ann. Rep. New York State Cab., 23: 81. 1872.
Mycena pinetorum Lange, Dansk Bot. Arkiv, 1 (5): 30. 1914.