North American species of Mycena.

EXCLUDED AND DOUBTFUL SPECIES

481

echinulate and nonamyloid. The difference in spore size noted above
is more likely caused by a difference in maturity than by a mixture of
species. Only four-spored basidia were seen, and there were no
differentiated pleurocystidia or cheilocystidia on the sections studied.
The gill trama is homogeneous, and the pileus trama is likewise homogeneous beneath a well-developed pellicle. All parts turned yellowish in iodine. I have found this species among Atkinson's and Peck's
unidentified material, but have not collected it myself. From Murrill's illustration and an examination of the specimens it is very evident
that the species is a Collybia, near C. erosa, as Kiihner has suggested.
Certain of Peck's collections identified as M. latifolia also belong
here.
Mycenaflava Murrill, Mycologia, 9: 320. 1917.
This is Bolbitius fava Murrill, Mycologia, 9: 320. 1917.
Mycena Glatfelteri (Pk.) Murrill, North Am. Flora, 10: 190. 1917.
This is Bolbitius Glatfelteri Peck, Bull. Torr. Bot. Club, 30:97.
1903.
Mycena gloiocyanea (Atk.) Murrill, North Am. Flora, 10: 191. 1917.
This is Bolbitius gloiocyaneus Atkinson, Ann. Myc., 6:54. 1908.
Mycena Grantii Murrill, Mycologia, 8: 220. 1916.
Prunulus Grantii Murrill, North Am. Flora, 9: 338. 1916.
"Pileus broad, convex to plane and at length depressed, not papillate, cespitose, 3-3.5 cm. broad; surface smooth, dry, glabrous, paleavellaneous: context thin, white, the taste mild; lamellae adnate,
rather crowded, of medium breadth, thin and delicate, pure-white:
spores subglobose to ellipsoid, smooth, hyaline, 6-7 X 5-6,: stipe
equal, dry, smooth, glabrous, concolorous, hollow, with a thin rind,
6-8 cm. long, about 5 mm. thick.
"Type collected on the ground among leaves and bits of dead
wood at Sequim, Washington, J. M. Grant 332 (herb. N. Y. State
Mus.).
"Distribution: Known only from the type locality."
I have never been able to recognize this species in the field. When
I first examined the type the iodine reactions were not taken, and I
considered the fungus to be near M. Berkeleyi. A second examina