noun tall fern of northern temperate regions having graceful arched fronds and sporophylls resembling ostrich plumes.
— synonyms: ostrich_fern, shuttlecock_fern, Matteuccia_struthiopteris, Pteretis_struthiopteris, Onoclea_struthiopteris
noun New World fern having woolly cinnamon-colored spore-bearing fronds in early spring later surrounded by green fronds.
— synonyms: cinnamon_fern, fiddlehead_fern, Osmunda_cinnamonea