The Agaricaceae of Ohio. 475 



I.^ Lamellae usually decurrent, 

 sometimes adnate at least 

 when young. 



Clitocybe (497) 



II.- Stipe cartilaginous, confluent 



with pileus but of different 



te.cture. 



I.^ Lamellae decurrent; pileus 



/ umbilicate. 



Omphalia (511) 

 L^ Lamellae not truly decurrent ; 

 pileus not umbilicate or 

 rarely so. 

 J.^ Pileus typically campanu- 

 late ; margin straight 

 from the first ; la- 

 mellae adnate or un- 

 cinate. 



Mycena (508) 

 J.^ Pileus not campanulate, 

 usually convexo-plane ; 

 margin at first in- 

 rolled ; lamellae free 

 or obtusely attached. 

 Collybia (502) 

 I".- Trama vesiculose (hyphae often en- 

 larged, in sections giving the appear- 

 ance of rounded cells). 

 G.^ Plants with a milky or colored juice. 



Lactaria (519) 

 G.- Plants with watery juice. 



Russula (525) 



RHODOSPORAE. 



A.^ Stipe eccentric or wanting. 



B.' Pileus lar~?. usually glabrous; lamellae white or whitish. 



Pleurotus (513) 



