THE BRITISH FERNS. 
THE BRITTLE BLADDER FERN. 
CYSTOPTERIS FRAGILIS. 
C. fronds membranaceous oblong-lanceolate, bipinnate; pinnœ 
ovate-lanceolate or oblong-lanceolate ; pinnules ovate lanceolate or 
oblong, blunt or acute, toothed, incised or pinnatifid. 
- (type): pinne acute, pinnules ovate or lanceolate, acute, 
pinnatifid with ovate or oblong toothed segments; sori medial. 
[Plate OI.] 
CYSTOPTERIS FRAGILIS, Bernhardi, Schrad. neues Journ. Bot. i. part 2, 26, 49, 
t. 2, fig. 9. Hooker & Arnott, Brit. Fl. 7 ed. 587. Babington, Man. Brit. 
Bot. 4 ed. 423, incl. 8. Deakin, Florigr. Brit. iv. 85, fig. 1600. Mackay, 
Fl. Hib. 841. Newman, Hist. Brit. Ferns, 3 ed. 87. Moore, Handb. Brit. 
Ferns, 3 ed. 233 ; Id., Ferns of Gt. Brit. Nature Printed, t. 46 A, fig 1. 
Bentham, Handb. Brit. Fl. 636. Sowerby, Ferns of Gt. Brit. 36, t. 19. 
Hooker, Gen. Fil. t. 52 B; Id., Sp. Fil. i. 197. Schott, Gen. Fil. (t. 8). 
Link, Fü. Sp. 46. Presl, Tent. Pterid. 93, t. 3, fig. 1. Fee, Gen. Fil. 299. 
Mettenius, Fil. Hort. Bot. Lips. 97. Koch, Syn. 2 ed. 980. Fries, Sum. 
Veg. 82. Ledebour, Fl. Ross. iv. 510. A. Gray, Bot. N. United St. 596. 
Pappe & Rawson, Syn. Fil. Afr. Aust. 16. Lowe, Nat. Hist. Ferns, vii. t. 31. 
CYSTOPTERIS ORIENTALIS, Desvaux, Prod. 264 ; according to Hooker. 
CYSTOPTERIS VIRIDULA, Desvaux, Prod. 264. 
PoLYPODIUM FRAGILE, Linneus, Sp. Plant. 1553. Bolton, Fil. Brit. 50, t. 27 
(bad), and t. 46. Fl. Dan. iii. t. 401. Poiret, Enc. Bot. v. 539 (excl. B). 
POLYPODIUM ANTHRISCIFOLEUM, Hoffmann, Deutschl. Fl. ii. 9; Id., Rem. and 
Ust. Bot. Mag. ix. 11, fig. 14, c, e. 
PoLYPODIUM CYNAPIFOLIUM, Hoffmann, Deutschl. Fl. ii. 9. 
POLYPODIUM POLYMORPHUM (B) LACINIATUM, and (D) FRAGILE, Villars, Hist. 
PI. Dauph. iii. 847, t. 53, figs. B. D. 
PoLYPODIUM TRIFIDUM, Withering, Arr. Brit. Pl. ii. 779. 
PoLYPODIUM ALBUM, a, Lamarck, Fl. Franç. i. 21. 
POLYPODIUM FUMARIOIDES, a. LOBATUM, Weis, Pl. Crypt. 319. Hofmann, 
Deutschl. Fl. ii. 9. 
ASPIDIUM FRAGILE, Swartz, Schrad. Journ. Bot. 1800, ii. 40 ; Id., Syn. Fil. 58. 
Willdenow, Sp. Plant. v. 280. Schkuhr, Krypt. Gew.. 58, tt. 54, 55, 56. 
Sprengel, Syst. Veg. iv. 107. Kaulfuss, Enum. Fil. 949. Sturm, Fl. 
(Farrn.) t. 4. Nyman, Syllog. Fl. Europ. 432. 
ASPIDIUM TRIFIDUM, Swartz, Schrad. Journ. 1800, ii. 41 (excl. syn. Eng. Bot.). 
ASPIDIUM DIAPHANUM, Bory, Hb. Desf. ; according to Webb. 
ASPIDIUM VIRIDULUM, Desvaux, Berl. Mag. v. 321. 
ASPIDIUM NEPALENSE, Edgeworth MS. Hb. Hook. 
ATHYRIUM FRAGILE, Sadler, Adumb. Epiphyll. Hung. 22. 
ASPLENIUM FRAGILLIMUM, Jacquemont MS. Hb. Mus. Par. 
CYATHEA FRAGILIS, Smith, Mem. Acad. Roy. Sc. Turin, v. 417 ; Id., Fl. Brit. 
ii. 1139 ; Id., Eng. Bot. xxiii. t. 1587. 




