SPECIES AXD VARIETIES OF BRITISH FERNS. GS 



PoLYPODIACEiE § PtERIDE^. 



Genus 11. PTERIS, Llnnanis. 

 1. P. aquilina, Linncciis. — The only Britisli species. Plate 

 XVII. fi- 1. 



o 



POLYPODIACE/E § AciANTEJi!. 



Genus 12. ADiANTUM, Linnwus. 

 1. A. Capillus-Veneris, Z/?i?i<fC2/s. — The only British spe- 

 cies. Plate XVI. fig. 1. " 



POLYPODIACE.E § CYSTOPTERIDEiE. 



Genus 13. CYSTO PTERIS, Bernhardi. 



1. C. fragilis, Bernhardi. — Fronds lanceolate, bipinnate, 



pinnules ovate, acute, toothed or lobed ; sori central. 

 . Plate X. fig. 1. 

 xar. angustata. — Pinnules ovate, deeply pinnatifid, the 



lobes with narrow acute teeth ; sori central. 

 'car. dentata. — Pinnules ovate, obtuse, bluntly-toothed, 



distinct ; sori marginal. 

 var. Dickieana. — Pinnules broad, obtuse, slightly blunt- 

 toothed, overlapping ; sori marginal. 



2. C. regia, Fred. — Fronds lanceolate, subtripinnate, seg- 



ments linear. Plate X. fisi'. 2. 



