Osmunda regalis forma linearis
| Osmunda regalis Linnaeus, forma linearis Clute, Fern Bull. 17: 10. 1909. | | TYPE: FLORIDA: Seminole Co.: Without data, Rapp s.n. (holotype: BUT?). |
Osmunda regalis subsp. spectabilis
| Osmunda regalis Linnaeus, subsp. spectabilis (Willdenow) Á. Löve & D. Löve, Taxon 26: 324. 1977. | BASIONYM: Osmunda spectabilis Willdenow 1810. | |
Osmunda spectabilis
| Osmunda spectabilis Willdenow, Sp. Pl. 5(1): 98. 1810. | | TYPE: PENNSYLVANIA: Without data, Muhlenberg s.n. (holotype: B). |
Osmunda mexicana
| Osmunda mexicana Fée, Mém. Foug. 9: 43. 1857. | | TYPE: MEXICO: Oaxaca: Without data, Galeotti 6388 (holotype: P?; isotype: BR). |
Osmunda palmeri
| Osmunda palmeri A. Bobrov, Novit. Syst. Pl. Vasc. 1968: 8. 1968. | | TYPE: MEXICO: Jalisco: Río Blanco, s.d., Palmer 660 (holotype: LE; isotypes: GH, K, UC, US). |
Osmunda palustris
| Osmunda palustris Schrader, Gött. Gel. Anz. 1824: 866. 1824. | | |
Osmunda regalis forma anomala
| Osmunda regalis Linnaeus, forma anomala (Farwell) S. K. Harris, Rhodora 35: 352. 1933. | BASIONYM: Osmunda regalis Linnaeus, subvar. anomala Farwell 1931. | |
Osmunda regalis forma intercallata
| Osmunda regalis Linnaeus, forma intercallata Dole, Fl. Vermont, ed. 3. 4. 1937. | | TYPE: VERMONT: |
Osmunda regalis forma nana
| Osmunda regalis Linnaeus, forma nana Fernald, Rhodora 51: 103. 1949. | | TYPE: CANADA: Newfoundland: NE base and slopes of Blomidon ("Blow-me-down") Mountains, Bay of Islands, 2 Aug 1910, Fernald & Wiegand 2341 (holotype: GH). |
Osmunda regalis forma orbiculata
| Osmunda regalis Linnaeus, forma orbiculata Clute, Fern Bull. 14: 115. 1906. | | TYPE: VERMONT: |
Osmunda regalis subsp. palustris
| Osmunda regalis Linnaeus, subsp. palustris (Schrader) Á. Löve & D. Löve, Taxon 26: 324. 1977. | BASIONYM: Osmunda palustris Schrader 1824. | |
Osmunda regalis subvar. anomala
| Osmunda regalis Linnaeus, subvar. anomala Farwell, Amer. Midl. Naturalist 12: 307. 1931. | | TYPE: MICHIGAN: Wayne Co.: Wayne, 3 Jun 1930, Farwell & Gladewitz 8670 (holotype: BLH; isotype: MICH). |
Osmunda regalis var. brasiliensis
| Osmunda regalis Linnaeus, var. brasiliensis (Greville & Hooker) Pichi Sermolli, Webbia 31: 247. 1977. | BASIONYM: Osmunda spectabilis Willdenow, var. brasiliensi Greville & Hooker 1832. | |
Osmunda regalis var. palustris
| Osmunda regalis Linnaeus, var. palustris (Schrader) C. Christensen ex Angely, Fl. Paraná 23: 10. 1963. | BASIONYM: Osmunda palustris Schrader 1824. | |
Osmunda spectabilis var. brasiliensis
| Osmunda spectabilis Willdenow, var. brasiliensis Greville & Hooker, in Hooker, Bot. Misc. 3: 230. 1832. | | TYPE: BRAZIL: |