Pte 



m -. 



1iiiU>"A'vV 

 



FIG. 110. M, diagrammatic transverse section of stem ofJfedulldaa anglica, after SCOTT: 

 acentric strands ; pd, periderm ; It, leaf trace ; X, diagram of part of transverse 

 section of stem of JftduUosa Solmsi, after WEBER and STERZEL, from POTOXIE : pla, 

 pti, larger concentric strands ; st, smaller concentric strands : O, transverse section 

 of stem of Lyginodendron Otiihamiitin. after WILLIAMSOX and SCOTT: P, part of 

 woody zone of same; ^, same, showing internal secondary wood and internal 

 phloem. 



