THE POLYSTICHUMS 



213 





Fig. 246. P. ang, retroflexum (centre of frond). 



Retroflexum (Fig. 246) . — Found by Mr. C. Jackson in Devon ; 

 many of the pinnae bent sharply backwards, clasping the stem. 



Remoto-decurrens Padley. — Found in S. Devon ; broad, 

 confluent pinnules, spiny. 



Revolvens. — Wills and others ; fronds of normal make, but 

 rolled symmetrically almost into tubes, very pretty. 



Fig. 247. P. ang. rohmdatum. 



Rotundatum (Fig. 247). — Found near Nettlecombe by Mr. 

 Elvvorthy, and, later on, by Mr. W. H. Phillips in Ireland ; very 

 distinct, the pinnules being almost round, and the serrations 

 minute ; both frond and pinnae terminals are rounded also. 



