any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

type genus of the Osmundaceae

large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds

North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile fronds

New World fern having woolly cinnamon-colored spore-bearing fronds in early spring later surrounded by green fronds; the early uncurling fronds are edible

type genus of the Osmundaceae