NATURE OF PLANTS 



5i 



Fig. 34. Portion of the formative region of the root taken at a in Fig. 

 23', r , root cap; v, cells which by repeated division add new cells to end 

 of root and to inside of root cap. Note the numerous dividing cells and 

 their uniformity in size. — I. D. Cardiff. 



Fig. 35. Portion of the region of elongation of the root taken at b in 

 Fig. 23- Note the larger size of the cells, increase in cell sap as indicated 

 by the larger vacuoles and absence of cell division; c, epidermis; c, cortical 

 region; p, central region. — I. D. Cardiff. 



