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Claytosmunda

Osmunda claytoniana (species), “Interrupted Fern”

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Claytosmunda is a genus of fern. It has only one species, Claytosmunda claytoniana (synonym Osmunda claytoniana), the interrupted fern, native to Eastern Asia, Eastern United States, and Eastern Canada. The specific epithet is named after the English-born Virginian botanist John Clayton. "Interrupted" describes the gap in middle of the blade left by the fertile portions after they wither and eventually fall off.The plant is known from fossils to have grown in Europe, showing a previous circumboreal distribution. Fragmentary foliage resembling Claytosmunda claytoniana has been found in the fossil record as far back as the Triassic, and is known as †Osmunda claytoniites. C. claytoniana is a paramount example of evolutionary stasis. Paleontological evidence indicates it has remained…

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Range Maps show field notes recorded by Natural Atlas contributors and other datasets via GBIF.org

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