Osmundaccce. 
259 
6D 
Fig. 86. Toden sitpeyba. Transverse section of stele showing relative 
lateral continuity of xylem. l.t., leaf-trace ; r., root. From Seward and Ford. 
Fig. 87. Osntundites Dunlopi. Part of xylem of stele in transverse section 
showing departure of leaf-trace without leaving a gap in the xylem. From 
Kidston and Gwynhe-Vaughan. 
