30 NEW YORK STATE MUSEUM 



Potamogeton lateralis Moro?ig. 



Hemlock and Canadice lakes. August. Abundant in Hemlock lake 

 near the inlet, also found in other parts of the lake. It forms dense 

 masses, has long internodes and is stiff and harsh to the touch. Sterile 

 plants with floating leaves were rare in this lake but more plentiful in 

 Canadice lake. Plants bearing gemmiparous reproductive buds were 

 frequent. 



Dicranodontium longirostre B. of S. 



Decayed wood. Adirondack mountains. Mrs. E. G. Britton. The 

 specimens are without fruit. 



Fissidens decipiens De Not. 

 Avalanche Pass, Adirondack mountains. Mrs. Britto)i. Sterile. 



Didymodon cylindricus B. df S. 



Cliffs of Avalanche Pass. Mrs. Britton Sterile. 



Jungermannia Michauxii Web. 

 Decaying pine trunks. Adirondack mountains. September. 



Calicium trichiale Ach. 

 Prostrate trunks of pine. Adirondack mountains. September. 



Tricholoma lugubre //. sp. 



Usually cffispitose; pileus convex, often irregular or repand and 

 lobed on the margin, glabrous, moist in wet weather, smoky-brown or 

 grayish-brown, involute on the ^margin, flesh white; lamellse narrow, 

 thin, close, almost free, whitish ; stem short, glabrous, solid, white ; 

 spores globose, .00024 in. broad. 



Pileus 1.5 to 3 in. btoad; stem i to 2 in. long, 4 to 6 lines thick. 



Bare ground under hemlock trees, Tsuga Canadensis. Deans Mills. 

 October. 



The closer narrower lamellae not assuming reddish tints, the short stem 

 and globose spores will separate this species from T. tumiduin. 



Tricholoma leucocephaloides n. sp. 



Pileus thin, convex, glabrous, obtuse or umbonate, hygrophanous 

 grayish-brown when moist, white or whitish when dry, flesh white, taste 

 farinaceous; lamellse moderately close, adnate or slightly emarginate, 

 whitish ; stem equal or slightly tapering upward, glabrous, sometimes 



