c 



Kt<^C-Tj 



Fig. 108.— .4, part of stem of Gleichenia flnhellata; £, stem of Adiantum palatum ; C, 

 rhizome ol Ptn-is at/ nil inn : I>. _\ oung stem of same ; /;", stem of Selaginella laevigata ; 

 I\ central cylinder of Osmunda Claytoniaua. 



