North American species of Mycena.

150 NORTH AMERICAN SPECIES OF MYCENA
1. Cheilocystidia with one or more thornlike projections.. 204. M. insignis
1. Cheilocystidia of the smooth fusoid-ventricose type................ 2
2. Spores globose to ellipsoid...................................... 3
2. Spores elongated to fusoid...................................... 6
3. Spores globose................................................. 4
3. Spores ellipsoid................................................ 5
4. Gills adnate; carpophores scattered on needle beds under conifers
68. M. Rickenii
4. Gills short-decurrent: cespitose on wood (but delicate)
66. M. translucentipes
5. On old acorns and nuts of hickory or walnut (white form)
75. M. luteopallens
5. Odor nitrous; on humus and debris under conifers (M. subaquosa might
key out here also)............................. 67. M. delectabilis
5. Odor none; carpophores gregarious on hardwood logs and debris
65. M. olida var. americana
6. Spores 8-10 (11) X 4-5 gj; subventricose............... 64. M. gypsea
6. Spores nearly cylindric, seldom over 3, wide...................... 7
7. Pleurocystidia scattered to quite abundant, 36-60 X 9-12,u
69. M. pseudolactea
7. Pleurocystidia, if present, embedded and difficult to locate, 18-26 X
4-6 iu......................................... 70. M. delicatella
63. MYCENA LINEATA (Fr.) Quelet sensu Lange
Flora Agar. Dan., 2: 46. 1936
Agaricus lineatus Fries, Syst. Myc., 1: 152. 1821.
Illustrations:
Text fig. 12, nos. 8-9 (p. 142).
Beardslee and Coker, Journ. Elisha Mitchell Sci. Soc., 40, pl. 15 (upper
right).
Fries, Icon. Sel. Hymen., 1, pl. 78, fig. 5.
Lange, Flora Agar. Dan., 2, pl. 55, figs. A, A1.
Pileus 5-10 mm. broad, ovoid, becoming convex, in age broadly
conic to slightly umbonate, apex obtuse, surface moist, glabrous,
with conspicuous broad translucent striations extending to the disc,
color "pale smoke gray" or the gray tinged with olive over the disc
and striations, the remainder watery white, fading, becoming opaque
in age and then chalky white; flesh rather thin and fragile, whitish or
grayish under the disc, odor and taste not distinctive; lamellae broadly