(46) 



7. Mesembrianthemum. Calyx partitions 

 unequal. Petals oo. Ovary co-celled, 

 oo-seeded. Fruit a capsule. Succulent. 



8. Hypericum. Calyx 4-5-parted. Petals 

 4-5. Fruit a capsule. 



9. Mentzelia. Ovary inferior. Calyx limb 

 5-parted, persistent. Capsule 1-celled. 

 Placentae 3, parietal. 



III. Polygynia, 



1. Spiraea. Ovaries superior, several seed- 

 ed. Fruit several follicles. Shrub. 



2. Eosa. Calyx 5-parted. Petals 5. Fruit 

 akenes enclosed in the' calyx tube form- 

 ing a spurious berry. Shrub. 



3. Calycauthus. Calyx cup-shaped, limb 



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

 GO akenes enclosed in the persistent ca- 

 lyx tube. Shrub. 



4. Eubus. Calyx 5-parted. Petals 5. Fruit 



co drupes on a conical receptacle. 

 Shrubs. 



5. Horkelia. Calyx campanulate, augment- 

 ed by 5 bractlets. Styles subteriniiial. 

 Fruit co akenes. 



6. Potentilla. Calyx flattened, augmented 

 by 5 bractlets. Ovaries on a slightly 

 conical receptacle. Styles lateral. Ak- 

 enes on a herbaceous thalamus. 



