Bottomley. Roy. Soc. Proc, B, vol. 89, Plate 22. 



Section through young frond. Series VI. x 235. 



— Auximones. 



Section through young frond. Series VIII. x 235. 



+ Auximones. 



Typical cells from old frond. Series VIII. x 610. 



Typical cells from old frond. Series VI. 

 x 610. 



— Auximones. 



+ Auximones. 



