34 



THE PEANUT— THE UNPREDICTABLE LEGUME 



occurrence of root hairs, Yarbrough's results confirm those of Badami 

 (3) and Waldron (75) that both high temperature and high humidity 

 favor their production. 



If one examines a cross section of the root (figure 4), it can be seen 

 that the innermost row of cortex cells constitutes a typical endodermis. 



T»7-. 





w 



.■■J 



:J- • 



« 



'ri' 



.-'•■■'J 



^% 



Figure 4. — Primary root of peanut seedling, cross section; s, stele; c, cortex; m, 

 meristematic zone; si, sloughing outer cells. No epidermis is present on the 

 root, (after Yorbrough, 76.) 



