g6 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 ofClitocybe decora, but 

 smaller, with more slender cartilaginous stem and spores measuring 

 io-ii 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. porrigensby 

 the spherical spores and the differentiated upper layer of the pileus. 

 From Panus angustatusitis 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 ulniarius Fr. On living maple trunks ; associated with 

 P a n u s s t r i g o s u s B. & C. in one case. 



ITygrophorus borealis Pk. On moist ground, mixed woods. 



ITygrophorus capreolarius Kalchb. Under balsam and spruce in 

 and among mosses in which the young plants are often completely 

 sunk. On sphagnum the stems attain a length oi S 10 cm. 



Efygrophorus ceraceus Fr. On the ground under balsam, 



