LEUCOSPOEAE. 299 



Lenzites. Horizontal, sessile, woody or corky; gills 

 radiating. 



Xerotus. Pileus coriaceous ; gills forking, margin thick. 



Panus. Pileus coriaceous; gills dry, decurrent, margin 

 quite entire. 



Lentinus. Pileus coriaceous ; gills decurrent, margin ser- 

 rate or irregularly toothed. 



B. MOLLES. More or less fleshy, soon decaying and not 

 reviving. (The species of Collybia and Marasmius are mostly 

 tough and more or less persistent and reviving, but do not 

 become rigid when dry.) 



* Gills decurrent. 



Cantharellus. Gills with the margin thick, narrow, 

 forking, rather waxy. 



Nyctalis. Gills rather thick, edge jblunt. Parasitic on 

 other fungi, rarely growing among dead leaves. 



Hygrophorous. Margin of gills thin and acute, rather 

 waxy; stem central. Growing on the ground. (Some 

 species in this genus have the gills adnate, or almost 

 free.) 



Pleurotus. Growing on wood. Stem when present, ex- 

 centric or lateral. 



Omphalia. Gills thin, pliant ; stem central, cartilaginous. 

 Pileus more or less depressed. 



Clitocybe. Gills thin, pliant; stem central, fibrous; spores 

 smooth, elliptical. 



Laccaria. Gills thin, pliant, mealy ; stem central, fibrous ; 

 spores globose, wurted. 



Lactarius. Exuding a white or coloured milk-like fluid 

 when broken; spores globose, warted. (In some 

 species the gills are adnate.) 



