POI.YSTICHUM. 07 



GENUS IV. 



POLYSTICHUM. Schott. 



The Shield Fenis are a charming yet small family, ha^-ing 

 coriaceous rigid fronds, varying from single pinnate to bi-tripinnat€ 

 fronds. 



Sori circular, and protected by an indusium. 



The name is derived from the Greek polys — manv, and 

 stichos — order. 



There are three British species and a large number of 

 varieties. 



