LLOYD 



PLATE 40 



*;* 



- * 



' . 



1 . Rubber in canal cells, nearby cortex and inner 



ray cells. Root 1.2 mm. diam. 



2. Older root. More rubber in rays. 



3. Root 2 mm. diam. 



4. Parenchyma ray from fig. 2. 



5. Upper part of hypocotyl, same age as fig. I . 



w 







6. Longitudinal section through old wood. 



7. Longitudinal section through mature leptome 



parenchyma, with a few parenchyma ray cells. 



8. Leptome; elongated elements. 



9. Companion cells and sieve tubes. No rubber 



in younger leptome on the left. 



