OF BALANOPHORE^. 67 



Fig. 17. Cells from fig. 10, showing the cell-contents. 



Fig. 18. Fully formed articulated filaments after the fall of the scales of the capitulura. 

 Fig. 19. The same, showing the appearance of the terminal cells. 

 Fig. 20. Old terminal cells of the articulated filaments, showing their wrinkled walls. 

 All but figs. 1 & 2 very highly magnified. 



Tab. XIV. 



Corytusa spharica, Hook. fil. 



Fig. 1. Mature, and fig. 2. Immature plants. 

 Fig. 3. Vertical section of fig. 2. 

 Fig. 4. Peltate bract. 



Fig. 5. Immature male flower and articulated filaments. 

 Fig. 6. Ditto more advanced. 

 Fig. 7. Ditto expanded. 

 Fig. 8. Transverse section of anthers. 

 Fig. 9. Articulated filaments. 

 Figs. 10 & 11. Mature female flowers. 

 Fig. 1 2. Vertical section of fruit. 

 Fig. 13. Seed. 



Fig. 14. Section of portion of rhizome showing the two portions of the root to be completely severed in 

 the axis of the rhizome. 

 All but figs. 1, 2 & 3, highly magnified. 



Tab. XV. 



Helosis Mexicana, Liebm. 

 Fig. 1. Plant of the natural size. 



Pig. 2. Vertical section of capitulum and upper part of peduncle. 

 Fig. 3. Very young peduncle on a branch of the rhizome. 

 Fig. 4. Vertical section of the same magnified. 



Fig. 5. Portion of capitulum vertically cut, showing the imbrication of the very young bracts. 

 Fig. G. Fully developed bract. 

 Fig. 7. Vertical section of ditto. 

 Fig. 8. Nascent Helosis on a rootlet. 



Fig. 9. Vertical section of a very young Helosis which has fully established itself on a root. 

 Fig. 10. Vertical section of a full-grown tuber of the rhizome, showing its attachment to the root. 

 Fig. 11. Similar section of another and larger one. 



Fig. 12. Transverse section of the peduncle, showing eight regularly placed vascular radiating bundles. 

 Fig. 13. Vascular tissue of the same. 

 Fig. 14. Transverse section of the rhizome, showing — a. lobed medullary sheath surrounding the axis 



or pith ; b. wedges of vascular tissue ; c. Uber ; d. detached masses of sclerogen-cells. 

 Fig. 15. Cells of liber. 



All but figs. 1, 2, 3, S & 10, very highly magnified. 



k2 



