126 BOTANICAL GAZETTE [AUGUST 
Fic. 54. Vertical section through growing point and young leaves in adult 
plant. X20. 
Fic. 55. Surface view of primordium of leaf seen from the side, next younger 
leaf also showing; dotted outline marks cavity of leaf. 3. 
Fic. 56. Transverse section of leaf in jig. 55 at 56. X20. 
Fic. 57. Transverse section of leaf in fig. 55 at 57. X20: 
Fic. 58. Transverse section of leaf in fig. 55 at 58. X20. : 
Fic. 59. Transverse section of leaf in fig. 55 at 59. X20. 
Fic. 60. Transverse section of leaf in fig. 55 at 60. X20. | 
Fic. 61. Transverse section of leaf in fig. 55 at Or. 
Fic. 62. Later stages of young leaves; eS shown pees outline. X1 
