CUCURBITA 



6ii 



parenchyma. The number and distribution of the parenchymatous 

 cells are also variable, but they are usually more numerous in the 



xy par 



pel ra 



Fig. 318. Transection of sector of mature root showing ray and secondary tissues: ca, 

 cambium ; pel, pericycle ; pel ra, pericyclic ray ; pd, periderm ; ph, phloem ; ty, tyloses ; ves, 

 secondary xylem vessel ; xy par, xylem parenchyma. 



