﻿Fig. 2. — Transverse section of root showing secondary thickenings: e, endodermis; 

 fc, laticiferous cell; px, protoxylem; sx, secondary xylem; ly, lateral root; X155. 



Koketsu (11) is one of the most recent investigators of lati- 

 ciferous vessels and cells, and, though the paper itself was not at 

 hand, a review states that his results uphold those of former workers. 

 He also gives a chemical analysis of the lactic fluid. 



