102 



FERNS: BRITISH AND FOREIGN. 



6. C.: Pfcyllitidis, Presl Polypodium Phyllitidis, Linn. ; 

 (Plum. Fil 1. 130). Tropical America. 



7 C. rutvictiini). Presl Polypodium nitidum, Kaulf. Cam- 

 pyloneurum latum, Moore, Ind. Fil p. 225. Tropical 

 America. 



8. C. brevifolium, Link. Polypodium brevifolium, Link; 



Mett. Fil Hort. Lips. Tropical America. 



** Fronds pinnate. 



9. C. decurrens, Presl Polypodium decurrens, Radd. Fil 



Bras. t. 33. Polypodium polyanthos, Hort. Brux. 

 Brazil. 



28. DRYNARIA, Bory ; J. 8m. 



Rhizome short, thick, and fleshy. Fronds rigid ; the sterile 

 (when present) sessile, broad cordate, sinuose or laciniated ; the 

 fertile stipitate or sessile, pinnatifid or pinnate, rarely simple, 

 the segments articulated with the rachis ; when sessile, the base 

 is similar to the special sterile frond. Veins external, elevated, 



Genus 28. Portion of mature frond, under side. No. 6. 



compound anastomosing, forming quadrate or hexagonal areoles; 

 primary veins costaBform or obsolete. Receptacles compital. 

 Sori round, small, numerous, and irregular, or transversely or 

 obliquely serial, sometimes confluent, forming a linear sorus 

 between the costasform veins. 





