Fig.  J.  Cross-section  (a)  of  rhizome,  magnified  10  diameters;  a,  outer 
layer  of  bark  ;  b,  middle  layer  of  bark  ;  c,  interrupted  circle  of  sclerenchyma 
fibres  ;  d,  inner  layer  of  bark  ;  e,  wood  ;  /,  pith. 
Fig.  4.  Cross-section  {b)  of  rhizome,  magnified  10  diameters;  <z,  outer 
layer  of  bark  ;  b,  middle  layer  of  bark  ;  c,  interrupted  circle  of  sclerenchyma 
fibres  ;  d,  inner  layer  of  bark  ;  e,  wood  ;  /,  pith. 
