Name: Interrupted fern
Distribution: Canada (Labrador, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Isl., Québec); St. Pierre et Miquelon; USA (Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Georgia, Iowa, Illinois, Indiana, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Vermont, Wisconsin, West Virginia)
71 CDN 72 CDN SPM 74 USA 75 USA 78 USA
Synonyms: hidden
= Osmunda basilaris Spreng.; Anleit. Kenntn. Gew. 3: 160 (1804)
= Osmunda claytoniana f. dubia (Grout) Clute; Fern Bull. 13: 119 (1905)
= Osmunda claytoniana f. tomentosa Neidorf; Amer. Fern J. 39: 100 (1949)
= Osmunda claytoniana L.; Sp. Pl. 2: 1106 (1753)
= Osmunda claytoniana var. dubia Grout; List N. Amer. Pterid.: 13, 28 (1901)
= Osmunda interrupta Michx.; Fl. bor. Amer. 2: 273 (1803)
= Osmunda monticola Wall.; Numer. List no. 52 (1829), nomen
= Osmundastrum claytonianum (L.) Tagawa; J. Jap. Bot. 17: 697 (1941)
= Plenasium claytonianum (L.) C.Presl; Gefässbündel Farrnkr. 17 (1847), et Abh. Königl. Böhm. Ges. Wiss., Math.-Naturw. Cl. V, 5: 325 (1848)
= Plenasium interruptum (Michx.) C.Presl; Gefässbündel Farrnkr. 17 (1847), et Abh. Königl. Böhm. Ges. Wiss., Math.-Naturw. Cl. V, 5: 325 (1848)
= Struthiopteris claytoniana (L.) Bernh.; J. Bot. (Schrader) 1800(2): 126 (1801)