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POLYADELPHIA, 



1. Hypericum. Ovary superior. Calyx 

 4-5-parted. Petals 4-5. Fruit cap- 

 sular. 



2. Mentzelia. Ovary inferior. Calyx limb 

 5-parted, persistent. Capsule 1-celled. 

 Placentae 3, parietal. 



SYNGENESIA, 

 I, JEqualis. 



A. Flowers ligulafe. 



a. Pappus plumose. 



aa. Receptacle paleaceous. 



1. Hypochseris. Palease of the receptacle 

 deciduous. 



bb. Receptacle not paleaceous. 



1. Microseris. Pappus paleaceous at base. 

 Akenes more than 5-costate, truncate at 

 apex. Scapigerous. 



2. Stephanomeria. Pappus setaceous, 

 somewhat plumose. Akenes 5-costate, 

 truncate at apex and base. Caulescent. 



3, Rafinesquia. Bristles of pappus arach- 

 noid, Akenes rostrate, 



4, Malacothrix, Pappus 1 -seriate. Bristles 

 scabrous, silky, deciduous in a ring, 

 Apex of akenes developed into a crown, 



