Plate X. 



Alariu crassifolia K.JELLM. 



Fiij;s. 1-H. Vîuioiis sbiges of development of the spmtphylls of the secoud- 

 ye;iv fronds showing the metiisoric morphological c-hange. The 

 first-year sporophylls have mostly dropped off lea^ iiig the sears 

 of their attachment points as AeiTiicose processes. Fig. 1, youüg 

 s])oi'ophylls as found at an early part of spring. Fig. 2, a more 

 advanced stage; the basal parts of the sporophylls are markedly 

 thicker and naiTOwer tliau the sterile upper })arts, and the 

 margins are finely crispated. All in natural size. 



