= Aspidium dentatum (Sm.) Sw.; Syn. Fil. [Swartz] 59 (1806), based on Polypodium dentatum Dicks.
= Aspidium fragile (L.) Sw.; J. Bot. (Schrader) 1800(2): 40 (1801)
= Aspidium fragile var. cuneifolium Wallr.; Fl. Crypt. Germ. 1: 20 (1831)
= Aspidium fragile var. obtusifolium Wallr.; Fl. Crypt. Germ. 1: 20 (1831)
= Aspidium fragile var. tenuifolium Wallr.; Fl. Crypt. Germ. 1: 20 (1831)
= Aspidium fumarioides (Weis) C.Presl; Reliq. Haenk. 1: 39 (1825)
= Aspidium regium (L.) Sw.; J. Bot. (Schrader) 1800(2): 41 (1801)
= Aspidium rhaeticum Willd.; Sp. Pl., ed. 4 [Willdenow] 5(1): 280 (1810) non (L.) Sw.)
= Aspidium trifidum Sw.; J. Bot. (Schrader) 1800(2): 41 (1801)
= Asplenium filix-femina var. retusum (Decne.) C.B.Clarke; Trans. Linn. Soc. London, Bot., ser. 2, 1: 492, t. 49, f. 2 (1880) (fide Fraser-Jenkins 2008)
= Athyrium dentatum (Sm.) Gray; Nat. Arr. Brit. Pl. 2: 11 (1821)
= Athyrium filix-femina var. retusum (Decne.) Bedd.; Ferns Brit. India 170 (1883)
= Athyrium fragile (L.) Spreng.; Anleit. Kenntn. Gew. 3: 136 (1804)
= Athyrium fragile var. ampliatum Strempel; Fil. Berol. Syn. 34 (1822)
= Athyrium fragile var. tenuius Strempel; Fil. Berol. Syn. 34 (1822)
= Athyrium pontederae (All.) Desv.; Mém. Soc. Linn. Paris 6(3): 266 (1827)
= Athyrium regium (L.) Spreng.; Anleit. Kenntn. Gew. 3: 139 (1804)
= Athyrium retusum (Decne.) Panigrahi; Refresher´s Course Utkal Univ. (Bubaneshwar, Orissa) Bot.: 44 (1998), comb. inval.
= Athyrium rhaeticum Sadler; Descr. Pl. Epiph. Hung. 22 (1820)
= Cyathea anthriscifolia (Hoffm.) Roth; Tent. Fl. Germ. 3(1.1): 98 (1799)
= Cyathea cynapiifolia (Hoffm.) Roth; Tent. Fl. Germ. 3(1.1): 98 (1799)
= Cyathea dentata Sm.; Fl. Brit. 3: 1141 (1804)
= Cyathea fragilis (L.) J.Sm.; Mém. Acad. Sci. Turin 5: 417 (1793)
= Cyathea regia (L.) T.F.Forst.; Syn. Pl. Ins. Brit. 194 (1798)
= Cyathea tenuis (Hoffm.) G.Gaertn., B.Mey. & Scherb.; 67 (1802), nom. illeg.
= Cyclopteris dentata (Sm.) Schrad. ex Gray; Nat. Arr. Brit. Pl. 2: 27 (1821)
= Cyclopteris fragilis (L.) Gray; Nat. Arr. Brit. Pl. 2: 9 (1821)
= Cyclopteris fragilis var. acuta Gray; Nat. Arr. Brit. Pl. 2: 10 (1821 publ. 1822)
= Cyclopteris fragilis var. obtusa Gray; Nat. Arr. Brit. Pl. 2: 10 (1821 publ. 1822)
= Cyclopteris fragilis var. rhaetica Gray; Nat. Arr. Brit. Pl. 2: 10 (1821 publ. 1822)
= Cyclopteris regia (L.) Schrad. ex Gray; Nat. Arr. Brit. Pl. 2: 27 (1821)
= Cyste fragilis (L.) Dulac; Fl. Hautes-Pyrenées 33 (1867)
= Cystea angustata (Hoffm.) Sm.; Engl. Fl. 4: 288 (1828)
= Cystea dentata (Sm.) Sm.; Engl. Fl. 4: 287 (1828)
= Cystea fragilis (L.) Sm.; Engl. Fl. 4: 289 (1828)
= Cystea regia (L.) Sm.; Engl. Fl. 4: 289 (1828)
= Cystopteris alpina var. regia (L.) L.Rossi; Magyar Bot. Lapok 10: 23 (1911)
= Cystopteris anthriscifolia Fomin; Kuzn. et al., Fl. Caucas. Crit. 1(1): 15 (1911)
= Cystopteris crispa (Gouan) H.P.Fuchs ex Janchen; Phyton (Horn) 10: 3 (1963)
= Cystopteris dentata (Sw.) Desv.; Mem. Soc. Linn. Paris 6(2): 263 (1827)
= Cystopteris emarginata Hook.; Sp. Fil. [W. J. Hooker] 1: 201 (1846)
= Cystopteris filix-fragilis (L.) Borbás; Balaton Tavának Növényföldr. 314 (1900), isonym
= Cystopteris filix-fragilis (L.) Chiov.; Ann. Bot. (Rome) 1: 210 (1903), isonym
= Cystopteris filix-fragilis (W.D.J.Koch) Wirtg.; Fl. Preuss. Rheinprov. 549 (1857)
= Cystopteris filix-fragilis subsp. fragilis (L.) Jahand. & Maire; Cat. Pl. Maroc [Jahandiez & Maire] 1: 2 (1931)
= Cystopteris filix-fragilis subsp. regia (L.) Jahand. & Maire; Cat. Pl. Maroc [Jahandiez & Maire] 1: 2 (1931)
= Cystopteris fragilis proles dentata (Sm.) Rouy; Fl. France [Rouy & Foucaud] 14: 422 (1913)
= Cystopteris fragilis proles regia Rouy; Fl. France [Rouy & Foucaud] 14: 424 (1913)
= Cystopteris fragilis subvar. favrati Christ; Farnkr. Schweiz 156 (1900)
= Cystopteris fragilis subvar. tavelii Christ; Farnkr. Schweiz 158 (1900)
= Cystopteris fragilis subvar. woodsioides Christ; Farnkr. Schweiz 158 (1900)
= Cystopteris fragilis f. angustata (Sm.) W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 3: 980 (1845)
= Cystopteris fragilis f. anthriscifolia (Hoffm.) W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 3: 980 (1845)
= Cystopteris fragilis f. cristata (Hopkins) Weath.; Amer. Fern J. 26: 13 (1936)
= Cystopteris fragilis f. cynapiifolia (Hoffm.) W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 3: 980 (1845)
= Cystopteris fragilis f. furcata Hahne; Fern Bull. 12: 115, 1904, & 18: 82 (1910)
= Cystopteris fragilis f. himalayensis Bir & K.Trikha; Amer. Fern J. 66: 110 (1976)
= Cystopteris fragilis subsp. dentata (Sm.) Hook.f.; Student. Fl. Brit. Isles 464 (1870)
= Cystopteris fragilis subsp. regia (L.) Bernoulli; Gefässkrypt. Schweiz 44 (1857)
= Cystopteris fragilis subsp. regia (L.) Simonk.; 609 (1887), isonym
= Cystopteris fragilis var. acutidentata Döll; Fl. Baden [Döll] 1(1): 43 (1855)
= Cystopteris fragilis var. acutifolia Bellynck; Fl. Namur 314 (1855), nom. illeg.
= Cystopteris fragilis var. acutifolia Lej.; Lej. & Court., Comp. Fl. Belg. 3: 309 (1836)
= Cystopteris fragilis var. altajensis (Gureeva) Stepanov; Sibirsk. Biol. Zhurn. 1993(1): 50 (1993)
= Cystopteris fragilis var. angustata (Hoffm.) Link; Fil. Spec. 46 (1841)
= Cystopteris fragilis var. anthriscifolia (Hoffm.) Borbás; Math. Term. Közlem. 14: 450 (1877)
= Cystopteris fragilis var. aprica Stepanov (L.) Bernh.; Sibirsk. Biol. Zhurn. 1993(1): 49 (1993)
= Cystopteris fragilis var. contorta Khullar; (fide Fraser-Jenkins 1997)
= Cystopteris fragilis var. cristata Hopkins; Ohio Naturalist 10: 181, fig. 2 (1910)
= Cystopteris fragilis var. cynapiifolia (Hoffm.) Borbás; Math. Term. Közlem. 14: 450 (1877), isonym
= Cystopteris fragilis var. cynapiifolia (Hoffm.) Godet; Fl. Jura 856 (1852)
= Cystopteris fragilis var. deltoidea Godet; Fl. Jura 856 (1852)
= Cystopteris fragilis var. dentata (Sm.) Bab.; 387 (1843)
= Cystopteris fragilis var. dentata (Sw.) Hook.; Sp. Fil. [W. J. Hooker] 1: 198 (1846), isonym
= Cystopteris fragilis var. linguiformis A.C.Schultz ex Lange; Meddel. Grønland 3: 306 (1887)
= Cystopteris fragilis var. lobatodentata Milde; Fil. Eur. 148 (1867), orth. var.
= Cystopteris fragilis var. lobulatodentata Milde; Sporenpfl. 67 (1865)
= Cystopteris fragilis var. lobulatodentata W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 3: 980 (1845)
= Cystopteris fragilis var. macrosorifera Stepanov; Sibirsk. Biol. Zhurn. 1993(1): 49 (1993)
= Cystopteris fragilis var. megaloba Döll; Fl. Baden [Döll] 1(1): 43 (1855)
= Cystopteris fragilis var. obtusifolia Bellynck; Fl. Namur 314 (1855)
= Cystopteris fragilis var. obtusifolia Lej.; Lej. & Court., Comp. Fl. Belg. 3: 308 (1836)
= Cystopteris fragilis var. pinnatipartita W.D.J.Koch; Syn. Fl. Germ. Helv., ed. 2, 3: 980 (1845)
= Cystopteris fragilis var. pseudoathyrium Stepanov; Sibirsk. Biol. Zhurn. 1993(1): 49 (1993)
= Cystopteris fragilis var. pumila Lej.; Lej. & Court., Comp. Fl. Belg. 3: 309 (1836)
= Cystopteris fragilis var. regularis A.C.Schultz ex Lange; Meddel. Grønland 3: 306 (1887)
= Cystopteris fragilis var. rupestris Neilr.; Fl. Nieder-Oesterreich 13 (1857)
= Cystopteris fragilis var. stenoloba Milde; Fil. Eur. 149 (1867)
= Cystopteris fragilis var. tenuis (Hoffm.) Borbás; Math. Term. Közlem. 14: 450 (1877)
= Cystopteris fragilis var. tripinnata Rupr.; Dist. Crypt. Vasc. Ross. 40 (1845)
= Cystopteris fragilis var. vulgaris Hook.; Sp. Fil. [W. J. Hooker] 1: 197 (1846), nom. inval.
= Cystopteris fragilis var. woodsioides (Christ) Rouy; Fl. France [Rouy & Foucaud] 14: 423 (1913)
= Cystopteris laciniata Colenso; Trans. & Proc. New Zealand Inst. 31: 265 (1899)
= Cystopteris mexicana Fée; Mém. Soc. Mus. Hist. Nat. Strasbourg 4(1): 299 (1850)
= Cystopteris novae-zealandiae J.B.Armstr.; Trans. & Proc. New Zealand Inst. 13: 360 (1881)
= Cystopteris polymorpha Bubani; Fl. Pyren. (Bubani) 4: 431 (1901)
= Cystopteris pontederae (All.) Link; Fil. Spec. 45 (1841)
= Cystopteris regia (L.) Desv.; Mem. Soc. Linn. Paris 6(2): 264 (1827) (sensu auct.)
= Cystopteris retusa Decne.; Voy. Inde [Jacquemont] 176, t. 177 (1844) (fide Fraser-Jenkins 2008)
= Cystopteris rhaetica Link; Hort. Berol. [Link] 2: 131 (1833)
= Cystopteris terminalis A.P.Khokhr.; Byull. Moskovsk Obshch. Isp. Prir., Otd. Biol. 88(5): 95 (1983) (as ´terminale´)
= Davallia humilis (C.Presl) Hook.; Sp. Fil. [W. J. Hooker] 1: 185 (1846)
= Filicula filix-fragilis (L.) Farw.; Amer. Midl. Naturalist 12: 234-251 (1931)
= Filicula filix-fragilis var. angustata (Hoffm.) Farw.; Amer. Midl. Naturalist 12: 252 (1931)
= Filicula filix-fragilis var. lobulato-dentata (Koch) Farw.; Amer. Midl. Naturalist 12: 252 (1931)
= Filix fragilis (L.) Gilib.; Exerc. Phyt. 2: 558 (1792), opus utique oppr.
= Filix fragilis (L.) Underw.; Our nat. Ferns ed. 4: 119 (1900), isonym
= Filix fragilis f. magnasora Clute; Fern Bull. 9: 65 (1901)
= Filix fragilis var. cristata (Hopkins) J.H.Schaffn.; Ohio Naturalist 11: 246 (1910)
= Filix fragilis var. dentata (Sm.) Underw.; Native Ferns, ed. 6: 119 (1900)
= Microlepia humilis C.Presl; Tent. Pterid. 125 (1836)
= Nephrodium polymorphum (Vill.) Opiz; Kratos 2(1): 11 (1820)
= Phegopteris rhaetica (Willd.) Watt; Canad. Naturalist Geol., n. s. 3(2): 159 (1867)
= Polypodium album Lam.; Fl. Franç. [Lamarck] 1: 21 (1779)
= Polypodium anthriscifolium Hoffm.; Bot. Mag. (Römer & Usteri) 9: 11, t. 14 (1790)
= Polypodium crispum Gouan; Ill. Observ. Bot. 81 (1773) non (L.) Desv.
= Polypodium cynapifolium Hoffm.; Deutschl. Fl., Theil 2 (Hoffm.) 2: 9 (1795)
= Polypodium dentatum Dicks.; Fasc. Pl. Crypt. Brit. 3, t. 7, f. 1 (1793), non Forssk. (1775)
= Polypodium filix-fragile L.; Sp. Pl. 2: 1091 (1753)
= Polypodium fragile L.; Sp. Pl. 2: 1091 (1753)
= Polypodium fragile var. angustatum Hoffm.; Bot. Mag. (Römer & Usteri) 9: 11, f. 14d (1790)
= Polypodium fumarioides var. laciniatum Weiss; 321 (1770)
= Polypodium fumarioides var. lobatum Weiss; 319 (1770), nom. inval.
= Polypodium fumarioides Weiss; Pl. Crypt. Fl. Gött. 319 (1770), nom. illeg.
= Polypodium polymorphum Vill.; Hist. Pl. Dauphiné [Villars] 1: 282, 292 (1786)
= Polypodium pontederae All.; Fl. Pedem. 2: 286 (1785)
= Polypodium regium L.; Sp. Pl. 2: 1091 (1753)
= Polypodium trifidum With.; Bot. Arrang. Veg. Great Brit., ed. 3, 3: 779 (1796)
= Tectaria fragilis (L.) Lag., Garcia & Clem.; Anales Ci. Nat. 5: 147 (1802)
= Tectaria regia (L.) Lag., Garcia & Clem.; Anales Ci. Nat. 5: 148 (1802)