IL'l>atlcce of North America. 



125 



Tribe VI. 

 ( Involucre oligophyllous A 



A J 



i Involucre polyphyllous F 



Leaves of involucre conduplicate. Diplophyllum. 

 Involucre 2-leaved, the leaves concave, deeply bilobed, 



dissected ciliate. Blepharozia. 

 B -i Involucre 2-leaved, the leaves concave, entire. Pleu- 



rozia. 



Leaves of involucre 2-many-dentate C 



Leaves of involucre undivided, entire. Aplozia. 



Leaves of involucre like those of them. Gymnocolea. 

 Leaves of involucre and of stem dissimilar D 



Mouth of inner involucre cristate. Lophocolea. 

 Mouth of inner involucre dentate E 



f Inner involucre semiconnate with calyptra. Harpan- 

 E \ thus. 



(^ Calyptra free within the inner involucre. Junyermania. 



f Leaves of involucre dissected. Cephalozia. 

 F -I Leaves of involucre articulate-ciliate. Blepharostoma. 

 \ Leaves of involucre palmate. Anthelia. 



Tribe VII. CHILOSCYPHE^E. 



f Inner involucre shorter than the calyptra. Chiloscy- 

 A \ phus. 



I Inner involucre longer than the calyptra B 



( Involucre oligophyllous. Coleochila. 



| Involucre polyphyllous C 



C Leaves of involucre squamiform. Lepidozia. 

 C -I Leaves of involucre undivided, serrulate. Pleuroschisma. 

 I Leaves of involucre bilobed. Odontoschisma. 



