(46) 



7. Mesembriantliemnm. — Calyx partitions 

 unequal. Petals cc. Ovary oo-celledj 

 Go-seeded. Fruit a capsule. Succulent. 



8. Hypericum. — Oalyx 4-5-parted. Petals 

 4-5. Fruit a capsule. 



9. Mentzelia. — Ovary inferior. Calyx limb 

 5-parted, persistent. Capsule X-celled. 

 Placentse 3, parietal. 



III. Polygynia. • 



1. Spifcea. — Ovaries superior, several seed- 

 ed. Fruit several follicles. Shrub. 



2. Ptosa. — Calyx 5-parted. Petals 5. Fruit 

 akenes enclosed in the calyx tube form- 

 ing a spurious berrj^ Shrub. 



3. Calycanthus. — Calyx cup-shaped, limb 



oo-parted, co-seriate. Petals 0. Fruit 

 00 akenes enclosed in the persistent ca- 

 lyx tube. Shrub. 



4. Rubus. — Calyx 5-parted. Petals 5. Fruit 



Gc drupes on a conical receptacle. 

 Shrubs. 



5. Horkelia. — Calyx camjiannlate, augment- 

 ed by 5 bractlets. Styles subtermiual. 

 Fruit GO akenes. 



6. Potentilla. — Calyx flattened, augmented 

 by 5 bractlets. Ovaries on a slightly 

 conical receptacle. Styles lateral. "Ak- 

 enes on a herbaceous thalamus. 



