126 Illinois State Lahoratorij of Natural Histonj. 



Tribe VIIL Tkichole^. 



Inner involucre rough. Tricholea. 

 Inner involucre smooth. Gymnoscyphus. 



Tribe IX. Saccogyne^. 



( Capsule spirally twisted B 



] Capsule regularly valved C 



\ Mouth of inner involucre fissured. Calypogeia. 

 J Mouth of inner involucre irregular. Cincinnulus. 



f Inner involucre terminal, laterally pedunculate. Gym- 

 C \ nanthe. 



I Inner involucre lateral, sessile D 



i Inner involucre not barbed at its insertion. Saccoyyna. 

 Inner involucre barbed at its insertion. Geocalyx. 



Tribe X. AcoLEJi. 



iCalyptra exserted. Mniopsis. 

 Calyptra included in the involucre B 



\ Leaves of involucre free. Acolea. 

 B \ 



i Leaves of involucre connate. Schisina. 



Tribe XL Mesophylle^, 



\ Involucre imbricate. Mesophylla. 



] Involucre in a circle B 



Sinner involucre exserted. Southbya. 

 Inner involucre included C 



\ Leaves of involucre opposite. Aliciilaria. 

 / Leaves of involucre whorled. Marsupella. 



