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Osmunda cinnamomea
Fern, 2.5 feet tall.
Marshy forest.
Metzger et al. proposed reorganization of the genus Osmunda in 2008:
http://pryerlab.biology.duke.edu/uploads...
I don't know who decides if/when the changes get accepted.
Wikipedia says the new name for this fern is Osmundastrum cinnamomeum. The USDA still calls is Osmunda cinnamomea. I haven't read the references to decide if the name has been officially updated.