North American species of Mycena.

480 NORTH AMERICAN SPECIES OF MYCENA

"Pileo conico umbonato densissime striato, lamellis liberis callo a
stipite discretis confertis, stipite cavo ventricoso pallido.
"Nulli descripto affinis. Gregarius, in spiritu vini conservatus
totus albidus 1. pallescens. Stipes valde crassus sursum attenuatus,
subinde conicus, basi solida, ceterum cavus, laevis, glaberrimus, 1~
unc. longus, basi ~ unc. usque, apice 2 lin. crassus. Pileus quam
maxime membranaceus, tenerrimus, sed umbone firmo laevi aequali
maxime prominente semper instructus, primo conicus, margine infracto, dein magis expansus, Coprino plicatili fere tenuior, striis delicatis longe confertissimis. Lamellae non tantum liberae, sed etiam
callo, omnino ut in A. procero stipitem cingente remotae, confertissimae, sublineares, adscendentes. Inter specimina numerosissima
fungum vidi affinem stipite 3-4 pollicari, fere aequali, pileo multo
latiore obtuso, lamellis latioribus; forsan tamen varietas est. In
insula St. Crucis. Benzon. (v. in spir. vini.)"
Mycena dissiliens (Fr.) Quelet.
This name should be discarded because of confused concepts.
Mycena echinipes (Fr.) Quelet.
American reports of this are very likely based on M. delicatella.
Mycena farinacea Murrill, Mycologia, 8: 220. 1916.
Prunulus farinaceus Murrill, North Am. Flora, 9: 326. 1916.
"Pileus conic to convex and at length plane, gibbous, gregarious,
reaching 1.5 cm. broad; surface smooth, dry, glabrous, more or less
striate, avellaneous-isabelline, margin entire, blackish (probably
frozen): context pallid, the odor and taste decidedly mealy; lamellae
adnexed, broad, crowded, ventricose, grayish-white: spores ellipsoid,
smooth, hyaline, 7-8 X 4-5,u: stipe cartilaginous, subequal, quite
short for the genus, smooth, polished, brownish, paler at the apex,
3 cm. long, 2 mm. thick.
"Type collected in an open mossy field near the New York Botanical Garden, October 8, 1911, W. A. Murrill & E. C. Volkert
(herb. N. Y. Bot. Gard.).
"Distribution: Known only from the type locality.
"Illustration: Mycologia 6: pl. 137. f. 3."
I have examined the type and found the spores to measure 5-6 X
4-5,u in some caps and 7-9 X 5-6 A in others. In all they are finely