DIP LOR A. 



197 



of a uniform green colour on both surfaces, are produced from a wide -creeping, 

 green, woody rhizome (prostrate stem), and borne on naked, greenish stalks 

 scarcely lin. long and articulated at the base. The leafy portion of the fronds, 

 although usually 9in. to lOin. long, is seldom more than Jin. broad, and 

 narrowed to both ends. The conspicuous sori (spore masses), Jin. to Jin. 

 long, are disposed from fifty to sixty on each side of the midrib. — Hooker, 

 Synopsis Filicum, p. 492. 



DIPTERIS— Dip'-ter-is. See Polypodium. 



