Osmunda claytoniana, the Interrupted fern, is a fern native to Eastern Asia and eastern North America, in the Eastern United States and Eastern Canada. This species is named after the English-born Virginian botanist John Clayton.
The plant is known from fossils to have grown in Europe, showing a previous circumboreal distribution. Fragmentary foliage resembling Osmunda. claytoniana has been found in the fossil record as far back as the Triassic, and is known as † Osmunda claytoniites
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