One pressed specimen of interrupted fern that was collected on a road from White Sulphur Springs, Greenbrier Co., WV, to Callaghan, Alleghany Co., VA. The term "interrupted" describes the gap left by the reproductive portions after they die and fall off the middle of the blade. The fossil record of Osmunda c. has been found as far back as the Triasic and paleontological evidence has indicated that it has remained unchanged for at least 180 million years. Osmunda claytoniana L.