Pte 













Fig. 110. — M, diagrammatic transverse section of stem of Medullosa unglica. after Scott: 

 st, concentric strands; pd, periderm; It, leaf trace; .Y. diagram of pari of transverse 

 section of stem of Medullosa Solum, after Weber and Stebzel, from Potonie: pla, 

 pU, larger concentric strands; *2, smaller concentric strands; 0, transverse >> 

 of stem of Lyginodendron Oldhamium, after Williamson and Scott; /'. part of 

 woody zone of same; \>. same, showing internal secondary wood and internal 

 phloem. 



