Struthiopteris regalis (L.) Bernh. species synonym

Osmunda regalis var. sublancea Christ variety synonym

Osmunda regalis f. divisa Makino form synonym

Osmunda banksiifolia Pr. species doubtful

Osmunda japonica var. sublancea (Christ) Nakai variety synonym

Struthopteris regalis (L.) Bernh., 1801 species synonym

Osmunda speciosa Wall. ex Hook. & Grev. species synonym

Osmunda regalis var. obtusifolia (Kaulf.) Milde variety synonym

Osmunda regalis var. biformis Benth. variety synonym

Polypodium acutum Burm.fil. species heterotypic synonym

Osmunda regalis var. cristata H.Osborn variety homotypic synonym

Osmunda japonica var. intermedia Honda variety synonym

Osmunda regalis var. monstrosa Wallr. variety synonym

Osmunda regalis var. cristata H.Osborn ex J.Dix variety synonym

Osmunda regalis var. albescens Ivery ex J.Dix variety synonym

Osmunda regalis var. incisa Gray variety synonym

Osmunda intermedia f. intermedia form synonym

Osmunda regalis var. albescens Ivery variety homotypic synonym

Osmunda spicata Link species synonym

Osmunda capensis C.Presl species heterotypic synonym

Osmunda regalis subsp. sublancea Christ subspecies synonym

Osmunda regalis var. brasiliensis (Hook. & Grev.) Kunze variety synonym

Pecopteris lignitum (Giebel, 1857) species accepted

Osmunda acuta (Burm.fil.) Fraser-Jenk. species accepted

Osmunda regalis var. spectabilis (Willd.) A.Gray variety synonym

Osmunda regalis var. palustris (Schrad.) C.Chr. ex Angely variety synonym

Ophioglossum osmunda Stokes species synonym

Osmunda macrophylla Penhallow, 1908 species accepted

Osmunda regalis var. brevifolia Desv. variety synonym

Osmunda regalis var. brasiliensis (Grev. & Hook.) Sturm variety synonym

Osmunda regalis var. japonica (Thunb.) Milde variety synonym

Osmunda spectabilis Willd. species accepted

Osmunda regalis subsp. japonica (Thunb.) Milde subspecies synonym

Osmunda lignita (Giebel, 1857) species synonym

Osmunda regalis subsp. biformis Benth. subspecies synonym

Osmunda obergiana Heer, 1895 species accepted

Osmunda heerii Gaudin, 1908 species accepted

Osmunda novaecaesarae Berry, 1907 species accepted

Osmunda doroschkiana Göppert, 1861 species accepted

Osmunda arctica Heer, 1883 species accepted

Osmunda torelli Heer, 1878 species synonym

Osmunda ×intermedia (Honda) Sugim. species accepted

Osmunda regalis var. montrosa Wallr. variety synonym

Aphyllocalpa regalis (L.) Lag., D.García & Clemente species synonym

Osmunda obtusifolia Kaulf. species synonym

Osmunda japonica f. divisa (Makino) Tagawa form synonym

Osmunda regalis var. abyssinica (Kuhn) Pic.Serm. variety synonym

Osmunda regalis var. huegelii Milde variety synonym

Osmunda regalis var. brasiliensis (Grev. & Hook.) Pic.Serm. variety synonym

Osmunda spectabilis var. brasiliensis Grev. & Hook. variety synonym

Osmunda wehrii C.N.Mill. species doubtful

Osmunda hilsenbergii Grev. & Hook. species synonym

Osmunda obtusifolia Willd. species synonym

Osmunda leschenaultii Wall. species synonym

Osmunda herbacea Copel. species accepted

Osmunda regalis f. anomala S.K.Harris form synonym

Osmunda obtusa Banks. & Sol. species doubtful

Osmunda speciosa Wall. species synonym

Osmunda biformis (Benth.) Makino species synonym

Osmunda lanceolata Roxb., 1844 species accepted

Osmunda schelpei A.E.Bobrov species synonym

Osmunda regalis f. abyssinica Kuhn form synonym

Osmunda abyssinica (Kuhn) A.E.Bobrov species accepted

Osmunda transvaalensis A.E.Bobrov species synonym

Osmunda gracilis Link species synonym

Osmunda barbata R.Br. species doubtful

Osmunda glaucescens Link species synonym

Osmunda lancea Thunb. species accepted

Osmunda barbara F.Muell. species doubtful

Osmundastrum lanceum (Thunb.) C.Presl species synonym

Osmundastrum japonicum (Thunb.) C.Presl species synonym

Osmunda japonica Thunb. species accepted

Osmunda regalis subsp. spectabilis (Willd.) Á.Löve & D.Löve subspecies synonym

Osmunda mexicana Fée species synonym

Osmunda plumieri Tausch species synonym

Osmunda piresii Brade species accepted

Osmunda regalis var. panigrahiana R.D.Dixit variety synonym

Osmunda regalis subsp. palustris (Schrad.) Á.Löve & D.Löve subspecies synonym

Osmunda regalis f. orbiculata Clute form synonym

Osmunda brayeri Watelet species synonym

Aphyllocalpa regalis (L.) Cav. species synonym

Osmunda regalis f. nana Fernald form synonym

Osmunda regalis var. longifolia C.Presl variety synonym

Osmunda palustris Schrad. species synonym

Osmunda hugeliana C.Presl species accepted

Osmunda regalis f. linearis Clute form synonym

Osmunda blechnoides Zoll. species doubtful

Osmunda regalis subsp. japonica (Thunb.) Á.Löve & D.Löve subspecies synonym

Osmunda palmeri A.E.Bobrov species synonym

Osmunda longifolia (C.Presl) A.E.Bobrov species heterotypic synonym

Osmunda regalis f. intercallata Dole form synonym

Plenasium hongkongense A.E.Bobrov species doubtful

Osmunda regalis var. obtusifolia (Willd.) C.Chr. variety synonym

Osmunda hybrida Tsutsumi, S.Matsumoto, Y.Yatabe, Y.Hiray. & M.Kato species accepted

Osmunda biformis var. divisa (Makino) Makino variety synonym

Osmunda japonica Houtt. species heterotypic synonym

Osmunda delawarensis Berry, 1906 species accepted

Osmunda hollicki Knowlton, 1918 species accepted

Osmunda regalis var. crispa Wallr. variety synonym

Osmunda montanensis Knowlton, 1905 species accepted

Osmunda lancea var. latipinnula Tagawa variety synonym

Osmunda sphenopteroides Fontaine, 1889 species accepted

Osmunda regalis var. obtusiuscula Milde variety synonym

Osmunda regalis var. pumila Milde variety synonym

Osmunda regalis var. plumieri (Tausch) P.E.Fourn. variety synonym

Osmunda regalis var. acuminata Milde variety synonym

Osmunda regalis var. capensis (C.Presl) Milde variety synonym

Osmunda japonica var. divisa (Makino) Nakai variety synonym

Osmunda bromeliifolia Ogata species doubtful

Osmunda lancea Thunb. ex A.Murray species doubtful

Osmunda regalis L. species accepted

Osmundastrum japonicum (Thunb.) J.Presl species synonym

Osmunda huegeliana C.Presl species synonym

Osmunda spectabilis var. palustris (Schrad.) C.Presl variety synonym

Osmunda regalis var. palustris (Schrad.) C.Chr. variety homotypic synonym

Osmunda greenlandica Brown, 1962 species accepted

Osmunda obliqua Poir Enc. species accepted

Osmunda dicksonioides Fontaine, 1889 species accepted