.. -1F2»e$rs 



Fiq. 109. — <?, forking central cylinder of Osmunda cinnamomea; H, central cylinder of 

 same; /. same, showing presence of internal phloem; /, part of central cylinder 

 Bhown in Anion- highly magnified ; K, mesarch bundle of same; L, stem of Hete- 

 rangium ffrievii, after Scott ; x 5: x, central mass of primary wood ; r s , secondary 

 wood; ic, inner cortex; U, leaf trace; >\ adventitious root: oc, outer cortex; pet, 

 petiole. 



