Osmunda clatonia


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Noun1.Osmunda clatonia - North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile frondsOsmunda clatonia - North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile fronds
osmund, flowering fern - any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters