LIST OF ILLUSTRATIONS. 



FIGUBB FAGS 



1. Diagram of a typical flower composed of six whorls ... 3 



2. Diagram of the positions of opposite leaves, illastrating the 



method of passage to alternate arrangements ... ... 11 



3. Diagrams of floral ffistiTations, showing the passage from the 



two-fifth or qnincnncial, to the contorted 15 



4. Diagram of flower of Qaridella, with stamens superposed to 



petals ... ... ... ... ... ... ... ... 21 



5. Diagram of flower of Hellehorus niger with stamens super- 



posed to twenty -one nectaries ... ... ... ... 22 



6. Diagrams illastrating the anatomy of the floral receptacle of 



a Wallflower, showing the origin of the floral members ... 82 



7. Diagram of the leaf-traces in the stem of Arahii albida ... 39 



8. Vertical and transverse sections of the wall of the inferior 



ovary of Campanula medium, showing how the eepaline 

 cords originate those of the rest of the floral organs (see 

 fig. 15, p. 71) 43 



9. Flower of Phyteuma, showing cohesion by contact and con- 



genital, in the corolla ... ... ... ... 50 



10. Flower of Iftmutut undergoing " dialysis " 51 



11. Stamens of OentoAirea, showing syngenesions anthers ; method 



of fertilisation by "piston-action" (b), nectaiy and direc- 

 tion of insect-proboscis, etc 60 



12. Anatomy of the floral receptacle of Hellebore, showing the 



changes in orientation of the cords ... 64 



13. Anatomy of the floral receptacle of Pelargonium, showing 



changes in the orientation, -in the separation and in the 

 union of the cords ... 65 



