Osmunda

Plants terrestrial. Stems creeping; tips often somewhat erect. Leaves dimorphic; fertile leaves erect, often notably smaller than sterile leaves in length and width. Blades 1--2-pinnate; pinnae monomorphic to dimorphic, pinnatifid or pinnate.

Coarse ferns with pinnate-pinnatifid or bipinnate lvs. 10, cosmop

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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