Proceedings Am. Philos Soc. Vol. LVI. No. 7 



Plate IV 



Fig. I. Transverse section of prop-root, showing cortex containing idio- 

 blasts, tannin cells and parenchymatic cells. Cork ouside and the endodermis 

 on the inner margin of the cortex. The vascular cylinder and medulla 

 inside. X io6. 



Fig. 2. Camera lucida drawing of longitudinal section. Cortex cells 

 showing sections of idioblasts and tannin cells. X 4/0. 



Fig. 3. Enlarged transverse section of cortex cells of absorptive root. 

 Large elliptic cells transfusion tissue smaller circular cells, longitudinal cells 

 containing starch. X 600. 



Fig. 4. Drawing (cam. luc.) of longitudinal section absorptive root. 

 X96. 



PROC. AMER. PHIL. SOC, VOL. LVI, NN, J.\NUARV 8, I918. 



