902 



A TEXTBOOK OF THEORETICAL BOTANY 





Medullary ray 



Fig. 884. — Acer pseudoplatanus. Longitudinal tangential 

 section showing narrow medullary rays cut transversely. 



|:^/ir=l- 



*■ i 





^ Phloem fibres 



'-s. 



Medullary ray 



3rW 



ilr 



'tiU^Lm&wii 



Fig. 885. — Tiliavulgaris. Longitudinal tangential 

 section through the phloem zone showing both 

 multiseriate and uniseriate medullary rays. 



