THE BRITTLE BLADDER FERN. 
CYATHEA CYNAPIFOLIA, Roth, Fl. Germ. iii. 98. 
CYATHEA ANTHRISCIFOLIA, Roth, Fl. Germ. iii. 98. 
CYSTEA FRAGILIS, Smith, Eng. Fl. 2 ed. iv. 285. 
CYSTEA REGIA, Smith, Eng. Fl. 2 ed. iv. 289 (in part, 1. e., the alpine plants). 
CYCLOPTERIS FRAGILIS, Gray, Nat. Arr. Brit. Pl. ii. 9. 
Var. angustata: pinnœ acutely elongated, pinnules lanceolate or 
ovate-lanceolate acute, pinnatifid or incised with long narrow acute 
teeth; sori medial. [Plate CII C.] 
CYSTOPTERIS FRAGILIS, V. ANGUSTATA, Link, Fil. Sp. 46 (excl. syn. Linnzus, 
Schkuhr, and Swartz). Babington, Man. Brit. Bot. 4 ed. 424. Deakin, 
Florigr. Brit. iv. 85, fig. c. Sowerby, Ferns of Gt. Brit. 37, t. 20. 
CysTOPTERIS FRAGILIS, B. TRIPINNATA, Ruprecht, Dist. Crypt. Ross. 40. 
OvsroPTERIS REJETICA, Link, Hort. Reg. Berol. ii. 181. Fee, Gen. Fil. 299 
(excl. syn.). 
CYSTOPTERIS DENTATA, B, Hooker, Brit. Fl. 1 ed. 445. 
POLYPODIUM FRAGILE ANGUSTATUM, Hoffmann, Rom. d Ust. Bot. Mag. ix. 11, 
fig. 14 d. 
PoLYPODIUM TENUE, Hoffmann, Deutschl. FU. ii. 9. 
PoLYPODIUM RHATICUM, Dickson, Hort. Kice. fasc. i. 17. Bolton, Fil. Brit. 80, 
t. 45. Withering, Arr. Brit. Pl. iii. 780. Poiret, Enc. Bot. v. 538. 
POLYPODIUM POLYMORPHUM (A) RHETICUM, Villars, Hist. Pl. Dauph. iii. 846, 
t. 53, fig. A. 
POLYPODIUM FUMARIOIDES, B. LACINIATUM, Weis, Pl. Crypt. 321. 
CYSTEA ANGUSTATA, Smith, Eng. Fl. 2 ed. iv. 288 (excl. syn. Aspidium 
rheeticum). 
CYATHEA FRAGILIS B. (excl, syn. Ray and Plukenet) and y, Smith, Fl. Brit. iii. 
1139. 
CYATHEA REGIA, Roth, Fl. Germ. iii. 96 (excl. syn. Linneus). 
ASPIDIUM FRAGILE B. Willdenow, Sp. Plant. v. 281 (excl. syn. Ray and 
Plukenet). 
ASPIDIUM RHATICUM, Willdenow, Sp. Pl. v. 280 (excl. syn.). 
ATHYRIUM RHZTICUM, Sadler, Adumb. Epiphyll. Hung. 22. 
CYCLOPTERIS FRAGILIS, B. RHATICA, Gray, Nat. Arr. Brit. Pl. ii. 10. 
Var. dentata: pinnules oblong, blunt obscurely toothed, or. shal- 
lowly lobed with short blunt teeth; sori submarginal. [Plate 
CII A.] 
CYSTOPTERIS FRAGILIS, v. DENTATA, Hooker, Sp. Fil. i. 198. Moore, Ferns of 
Gt. Brit. Nature Printed, t. 46 A. fig. 4. Deakin, Florigr. Brit. iv. 84, 
fig. œ. 
CYSTOPTERIS FRAGILIS, Kunze, Linneo, ix. 97, according to Hooker; 1d., Lin. 
2% GIL 
CYSTOPTERIS DENTATA, Desvaux, Prod. 263. Hooker, Brit. Fl. 1 ed. 445. Link, 
Fil. Sp. 45. Fée, Gen. Fil. 299. Sowerby, Ferns of Gt. Brit. 38, t. 21. 
Babington, Man. Brit. Bot. 4 ed. 424. Ê 
CYSTOPTERIS PONTEDERA, Link, Fil. Sp. 45, in obs. 
CYSTOPTERIS JAMAICENSIS, Desvaux, Prod. 263. 
CYSTOPTERIS FUMARIOIDES, Kunze, Linnœa, ix. 97. Fee, Gen. Fil. 299. 

