
THE BRITISH FERNS. 
CYSTOPTERIS RETUSA, Decaisne, Jacquem. Voy. dans ? Ind. 176, t. 177. 
CYSTOPTERIS CHILENSIS, and C. FRAGILIS, v. CHILENSIS, Fée, Gen. Fil. 299, 300. 
PoLYPODIUM DENTATUM, Dickson, Pl. Orypt. Brit. fasc. iii. 1, t. 7, fig. 1. 
PoLYPoDIUM PONTEDERA, Allioni, Fl. Pedem. ii. 286. Swartz, Syn. Fil. 68. 
(Seguier, Pl. Veron. Supp. t. 1, fig. 2.) 
POLYPODIUM TENERRIMUM, Poiret, Enc. Bot. v. 536. 
ASPIDIUM DENTATUM, Swartz, Syn. Fil. 59. Willdenow, Sp. Plant. v. 273. 
Sprengel, Syst. Veg. iv. 104. ` 
ASPIDIUM PONTEDERE, Willdenow, Sp. Plant. v. 237. Poiret, Enc. Supp. ii. 
518. Nyman, Syllog. Fl. Europ. 432. 
ASPIDIUM COLOBODON, Kunze, ‘‘ Coll. Pl. Chil. i. n. 265 ;" according to Kunze. 
ATHYRIUM PONTEDERE, Desvaux, Prod. 266. 
ATHYRIUM FUMARIOIDES, Presl, Rel. Hoenl. i. 39, t. 6, fig. 2. 
ATHYRIUM DENTATUM, Gray, Not. Arr. Brit. Pl. ii. 11. 
CYATHEA DENTATA, Smith, Fl. Brit, iii. 1141; Id., Eng. Bot. xxiii. t. 1588. 
CYATHEA FRAGILIS, Roth, Fl. Germ. iii. 94. 
CYSTEA DENTATA, Smith, Eng. Fl. 2 ed. iv. 287. 
CYOLOPTERIS DENTATA, Gray, Nat. Arr. Brit. Pl. in corrigenda. 
Var. Dickieana: pinne deflexed, overlapping ; pinnules crowded, 
broad, obtuse, decurrent, very slightly toothed, or bluntly lobed’ 
with the lobes scarcely toothed ; sori submarginal, distinct. [Plate 
CII B.] 
CYSTOPTERIS FRAGILIS, v. DICKIEANA, Moore, Handb. Brit. Ferns, 1 ed. 81; 
2 ed. 73; 3 ed. 234 ; Id., Bot. Gaz, i. 310 ; Id., Ferns of Gt. Brit. Nature 
Printed, t. 46 A. fig. 5, 6. Hooker & Arnott, Brit. Fl. 7 ed. 587. 
CYSTOPTERIS DICKIEANA, Sim, Gard. Journ. 1848. 308. Newman, Phytol. 
1851, App. xxvi. ; Id., Hist. Brit. Ferns, 3 ed. 93. Houlston & Moore, 
Gard. Mag. Bot. iii. 315, with plate. Lowe, Nat. Hist. Ferns, vii. t. 33. 
CYSTOPTERIS DENTATA, v. DICKIEANA, Babington, Man. Brit. Bot. 8 ed. 412. 
Sowerby, Ferns of Gt. Brit. 39, t. 22. 

Caudex short, tufted, decumbent, slowly spreading, scarcely creep- 
ing, ŭe., advancing laterally by the successive projection of the 
fronds, which form a tuft at the extremity; somewhat scaly. Scales 
pale brown, lanceolate. Fibres branched, wiry, numerous. 
Vernation circinate. 
Stipes slender, brittle, readily breaking away from the caudex, 
dark brown at the base, and there furnished with a few narrow 
lanceolate scales, paler or green and smooth upwards; terminal and 
adherent to the caudex. 
Fronds from three or four to twelve or eighteen inches in length, 
erect, herbaceous, dull green, smooth, oblong-lanceolate, bi-pinnate, 

