PLATE XXIV. 



Fig. 13. Wood parenchyma cells and fiber tracheids. x 295. 

 Fig. 14. Longitudinal section of young stem, showing tracheal tubes 

 and wood parenchyma, x 335. 



Fig. 15. Longitudinal section of part of old stem, x 335. A, phloem 

 parenchyma cells; B, parenchyma cells of the pericycle; C, suberised cells. 



