Cinnamon fern
Osmundastrum cinnamomeum, commonly known as the cinnamon fern or the buckhorn fern, is a species of royal fern native to the Americas and Asia. It is the sole living representative of the genus Osmundastrum, which was separated from Osmunda after modern phylogenetic studies demonstrated that Osmunda was not monophyletic. In North America it occurs from southern Labrador west to Ontario, and south through the eastern United States to eastern Mexico and the West Indies; in South America it occurs west to Peru and south to Paraguay. In Asia it occurs from southeastern Siberia south through Japan, Korea, China and Taiwan to India, Myanmar, Thailand and Vietnam.
From Wikipedia, licensed under CC BY-SA 4.0
Research Mentions
Royal ferns nearly vanished after ancient warming, study shows
The royal fern you might grow beside a pond today is a survivor of a 180-million-year slump that ...