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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. 
Placentz 3, parietal. 
SYNGENESIA, 
I, Aqualis. 
A. Flowers ligulate. 
1, 
a. Pappus plumose. 
aa. Leceptacle paleaceous. 
Hypocheris.—Paleaw of the receptacle 
deciduous. 
bb. Receptacle not paleaceous. 
Microseris.—Pappus paleaceous at base. 
Akenes more than 5-costate, truncate at 
apex. Scapigerous. 
Stephanomeria. — Pappus __ setaceous, 
somewhat plumose. Akenes 5-costate, 
truncate at apex and base. Caulescent. 
Rafinesquia.—Bristles of pappus arach- 
noid, Akenes rostrate, 
Malacothrix.—Pappus 1-seriate, Bristles 
scabrous, silky, deciduous in a ring, 
Apex of akenes developed into a crown, 
