AS AIDS IN THE DETERMINATION OF SPECIES. 63 



PLATE 2. 



Fig. 11. E. occidentali.i — Transverse section of petiole. 



(Glycerine jelly). 

 Fig. 12. E. cornuta — do. do. 



(Balsam). 



Fig. 13. E. rornuta, var. lehmanni — Transverse section of petiole. 

 (Glycerine jelly). 



Fig. 14. E. ohcordata— do. do. 



(Glycerine jelly). 



Fig. 15. E, marrjinata — do. do. 



(Glycerine jelly). 



Fig. 16. E. ilirersicolor — do. do. 



(Glycerine jelly). 



PLATE 3. 



(Glycerine jelly and iron stain). 



PLATE 4. 



Fig. 22a, E. caloplnjUa — Transverse section of petiole. 

 (Balsam). 



Fig. 23. E.ficifoUa— do. do. 



(Glycerine jelly, nitric acid, and iron stain). 



Fig. 23a. E.ficifoUa — Transverse section of petiole. 



Fig. 24. E. alpina— do. do. 



(Glycerine jelly). 



Fig. 25. E. punctata — do. do. 



(Glycerine jelly). 



Fig. 26. E. mnculata, var. Ci/r/oiiora— Transverse section of tbe petiole. 

 (Glycerine jelly and iron stain). 



PLATE 5. 



Fig. 26. E. maciilata, var. citriothra — Transverse section of another petiole, showing abnormal number of Central Canals 

 (Glycerine jelly). 



Fig. 27. E, corijiiocalyx — Transverse section of petiole. 

 (Glycerine jelly). 



Fig. 28. E. melUodora — do. do. 



(Glycerine jelly). 



Fig. 29. E. tereticoruis — do. do 



(Glycerine jelly). 



Fig. 30. E. saligna — do. do 



(Glycerine jelly). 



Fig. 31. E, mnculata — do. do. 



(Glycerine jelly 



