PLATE XIV. 



Fig. Gi. Cross section of stem, No. 1, in sixth year, showing- rings of 

 growth, tracheal tubes, medullary rays, and bark. Bast stipuled. X 23. 



Fig. 62. Cross section of stem, No. 2, in seventh year, showing same 

 elements as fig. 61. X 23. 



Fig. 63. Cross section of stem, No. 3, in fourth year, showing same 

 elements as fig. 61. X 23. 



Fig. 64. Cross section of stem, No. 4, in third year, showing same 

 elements as fig. 61. X 23. 



