on British Ferns. iii 



Stipes black, shining, about the same length as the 

 frond ; frond deltoid, pinnate ; pinnte alternate, pinnate, 

 pinnules stalked, leaf-like. 



Sea-coast of Devonshire, Cornwall, Glamorganshire, Isle 

 of Man, and South Isles of Arran. 



Family. — Pteride^. 



Ultimate divisions of frond with a distinct mid-vein, la- 

 teral veins branched and united at their extremities by a 

 distinct marginal vein, on which the capsules are placed in 

 a continuous line, and are covered by the bleached reflexed 

 epidermis. 



Genus. — Eupteris, Newman. 



Mid-vein distinct, lateral veins anastomosing at the mar- 

 gm, forming a marginal vein : involucre attached to inner 

 side of marginal vein, linear, its margin split into capillary 

 segments : capsules attached in a linear series to the mar- 

 gmal vein, exterior to the involucre : epidermis prolonged, 

 bleached, reflexed, split into capillary segments and cover- 

 ing the capsules in the manner of an involucre. 



Eupteris aquilina. 



Pteris aquilina, Lifin. Sp. PI. 1533 ; Light/. Fl. Scot. 657 ; 

 Huds. Fl. Ang. 451 ; Bolt. Fil. Brit. 16, t. 10 ; With. 

 Arr. 765 ; Sm. E. F. iv. S18, E B. 1Q7 9 ; Mack. Fl. 

 Hib. 343 ; Neivm. N. A. 11, F. 9S ; Hook, and Am. 

 575; Bah. 415. 

 Eupteris aquilina, Newm. Phytol. n. 278. 



Ehizoma creeping ; stipes long ; frond deltoid, tripin- 

 nate, erect. 



Abundant everywhere except on chalk. 



Obs. — There are several other natural divisions of the Linnean 

 genus Pteris, but neither of them contains British species. Messrs. 

 Houlstonand Moore, in their "Descriptive List of Cultivated Ferns," 

 now in course of publication in the ' Gardeners' Magazine of Botany,' 

 treat all the species of Eupteris as identical, thus making one species 



