Osmunda cinnamomea L.

  • Authority

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

  • Family

    Osmundaceae

  • Scientific Name

    Osmunda cinnamomea L.

  • Description

    Species Description - Lvs clustered, 6–12(–16) dm; petiole densely woolly when young; blade pinnate-pinnatifid, dimorphic, the sterile ones oblong, to 3 dm wide, relatively firm, shining green, gradually tapering to the tip, as also the individual pinnae; pinnae oblong-lanceolate, sessile, 15–25 pairs, alternate or subopposite, to 15 × 3 cm, with a tuft of brownish hairs at the base, deeply pinnatifid, the segments 15–20 on a side, alternate, broadly oblong, obtuse or subacute, usually entire, laxly ciliate, the veins 9–12 pairs per segment; fertile lvs vernal, central, surrounded by the larger sterile outer ones, soon withering brown, essentially bipinnate, the rachis long-woolly, the pinnae 2–4 cm × 8–15 mm; sporangia cinnamon-brown; 2n=44. Swamps, streambanks, and other moist places in subacid soil; Lab. to Minn., s. to Fla., Tex., N.M., and trop. Amer.; e. Asia. Ours is var. cinnamomea.

  • Common Names

    cinnamon-fern