Jeiiyavd bles WAU 
Figure 44.—Longitudinal section of young root still enclosed in the 
stem; showing its origin in the stem, the meristematic epider- 
mis and subepidermis in the stem above root apex and the 
four meristematic layers in the root. >< 210. 
Figure 45.—Portion of rootstock and root; the latter showing cole- 
orrhiza. >< 6. 
Figure 46.—Cross section of vascular bundle of root with endoder- 
mis; showing tracheae and sieve tubes. >< 400. 
Figure 47.—Longitudinal section of vascular bundle of root, also 
with endodermis and, to the left, three layers of cortical par- 
enchyma; showing tracheae, sieve tube, companion cell and 
undulations in walls of cortical parenchyma. >< 400. 
