Spore leaf. I think. The purple flower in the background is not this fern... Gothenburg bot.g., Sweden. Planted. 2005-06-04.Osmunda cinnamomea L. Engl.: cinnamon fern, buckhorn, cinnamon-colored fern. Deu.: Zimtfarn. Jap.: yamadori-zenmai. Bot. syn.: Osmunda imbricata KuntzePersonal use? Non-commercial use? Commercial use? Read the Fine Print. Comments? Tell me.