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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. Squalls. 



A. Floioers Ugidate. 



a. Pappus plumose. 



aa. Receptacle paleaceous. 



1. Hypocliseris. — 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, 



