ILLUSTRATION No. 2. 



N 



a 



Part of Transverse Section of Secondary root of date palm (Phoenix dactylifora) X 116 diameters. 

 () Centre of the root. 

 (M Outer boundary of ceatral portion (stele). 



(c) Bands of tough scle-ronehymatous tissue. 



(d) Large air passages. 



(e) Outer wall of root. 



The extra -stelar tissues include all those between (b) and (e). 



The stelar tissues are chiefly sclerenchymatous, 



(See para. 2, page I.) 



