96 NEW YORK STATE MUSEUM 
tinge. It differs from M. denticulata Pk. and M. pur- 
pureofusca Pk. in its large spores which measure 10-12 by 6-7 
microns. 
Mycena vitilis Fr. On moss and black soil in springy places in a 
cedar swamp. A long-stemmed elegant little species. 
Mycena vulgaris Fr. In mixed woods among fallen leaves and 
conifer needles. 
Omphalia albidula Pk. On debris, under balsam. 
Omphalia austini Pk. On stump of Arbor vitae. This is a small 
white species with viscid pileus. 
Omphalia campanella Fr. On decayed wood of conifers. 
Omphalia chrysophylla Fr. On decaying prostrate conifer trunks. 
Somewhat of the habit and colors of Clitocybe decora, but 
smaller, with more slender cartilaginous stem and spores measuring 
IO-I1 by 4—5 microns. 
Omphalia demissa Fr.— Bres. In balsam and spruce swamp. Dis- 
tinguished among the small species by the large spores, 10-12 by 6-7 
microns. The colors are paler than in the typical form, without any 
purplish tints. 
Omphalia fibula Fr. On and among mosses. 
Omphalia umbellifera Fr. On decayed wood. 
Pleurotus albolanatus (Pk.). (See Agaricaceae of Michigan.) 
On much decayed birch logs. Separable from P. porrigens by 
the spherical spores and the differentiated upper layer of the pileus. 
From Panus angustatus it is separated by the lack of cystidia. 
Pleurotus applicatus Fr. On rotten wood of conifer forests. 
Pleurotus circinatus Fr. On decayed logs in spruce woods. 
Pleurotus lignatilis Fr. On dead wood of deciduous trees. 
Pleurotus mitis Fr. On sticks and debris in woods. 
Pleurotus porrigens Fr. On decayed conifer logs and stumps 
The margin of the pileus is persistently inrolled. 
Pleurotus sapidus Fr. On dead trunks and logs. 
Pleurotus serotinus Fr. On mossy logs in mixed woods. 
Pleurotus sulfuroides Pk. On conifer logs. 
Pleurotus ulmarius Fr. On living maple trunks; associated with 
Panus strigosus B. & C. in one case. 
Hygrophorus borealis Pk. On moist ground, mixed woods. 
‘Hygrophorus capreolarius Kalehb. Under balsam and spruce in 
and among mosses in which the young plants are often completely 
sunk. On sphagnum the stems attain a length of 8-10 cm. 
Hygrophorus ceraceus Fr. On the ground under balsam. 
