North American species of Mycena.

272 NORTH AMERICAN SPECIES OF MYCENA

toothed in age, close, 17-20 reach the stipe, usually only two tiers of
lamellulae, narrow and equal (1.5-2 mm.), "snuff brown" when
young, becoming "cinnamon buff" in age, edges even and pallid;
stipe 2-5 cm. long, 1-1.5 mm. thick, equal, tubular, cartilaginous
and only moderately brittle, base very slightly white-strigose, glabrous
above or the apex faintly pruinose, soon polished, concolorous with
the cap or the apex slightly paler.
Spores narrowly ellipsoid, 7-8 X 3.5-4 u, amyloid; basidia 26-28
X 6-7 A, four-spored; cheilocystidia 20-32 (35) X 9-12,, covered
with small rodlike projections, hyaline; pleurocystidia not differentiated; gill trama very pale vinaceous brown in iodine; pileus trama
composed of a very thin, nongelatinous pellicle, beneath it a region
of inflated cells which occupies half the tramal body and the remainder
of filamentous tissue, all but the pellicle very pale vinaceous brown in
iodine.
Habit, habitat, and distribution.-Scattered to gregarious on pine
needles, late summer and fall; Ontario and Michigan. Rare.
Material studied.-Smith, 33-1017, 986, 1620, 4848, 6995, 14937.
Kauffman, September 23, 1911, Michigan. Mains, 34-147.
Observations.-This species has a decided resemblance to species
of the genus Galerina. Its hyaline spores, of course, prevent one
from making the mistake of trying to key it out there. The russet
to tawny or ochraceous colors in all parts are very peculiar for a
Mycena. As Kiihner has pointed out, M. vitrea var. galericolor
Favre, in Ktihner, very closely approaches my concept of M. psammicola, but it is described as having a nitrous odor, a pileus 3-4 cm.
broad, and cheilocystidia 30-55 X 15-25 A. These characters distinguish it rather sharply from the American fungus. My determination of the European species is based on Cooke's illustration
and Rea's description. The rooting stipe was present in some carpophores of my collections but seemed to be merely a secondary development caused by the loose mat of needles and debris and did not appear
to be a true pseudorhiza.
130. MYCENA METATA (Fr.) Quelet
Champ. Jura et Vosges, p. 106. 1872
Agaricus metatus Fries, Syst. Myc., 1: 144. 1821.
Illustrations:
Plate 50 A; Text fig. 32, nos. 11-12 (p. 268).
Lange, Flora Agar. Dan., 2, pl. 56 F (good).