102 
FERNS : BRITISH AND FOREIGN. 
6. C. Phyllitidis, Fresl. Polypodium Phyllitidis, Linn. ; 
(Plum. Fil. t. 130). — Tropical America. 
7. C. nitidum, Fresl. Polypodium nitidum, Kaulf. Cam- 
py loneurum latum, Moore, Ind. Fil. p. 225. — Tropical 
America. 
8. C. brevifolium, Link. Polypodium brevifolium, Link ; 
Mitt. Fil. Sort Lips. — Tropical America. 
** Fronds pinnate. 
9. C. decurrens, Fresl. Polypodium decurrens, Radd. Fil . 
Eras. t. 33. Polypodium polyantkos, Hod. Brux . — 
Brazil. 
28. DRYNARIA, Bory ; J. Sm. 
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 costasform or obsolete. Receptacles compitaL 
Sori round, small, numerous, and irregular, or transversely or 
obliquely serial, sometimes confluent, forming a linear sorus 
between the costaeform veins. 
