Osmunda cinnamomea L.

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Osmundaceae

  • Scientific Name

    Osmunda cinnamomea L.

  • Description

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    Species Description - Rhizome stout, horizontal, with hairs and old leaf bases; stipe 1/3 the frond length, stramineous, darker at base, glabrous or with some soft, lax, cinnamon hairs; fronds to 1.5 m tall, holodimorphic; sterile fronds pinnate-pinnatifid, to 20 cm wide, elliptic to ovate-lanceolate, chartaceous to subcoriaceous; pinnae glabrous except for tuft of short hairs at base of each pinna on lower side, to 13 cm long, 2 cm wide, spreading to ascending; pinnules slightly ascending, broadly acute, margin entire, short hairs scattered on veins and margin of pinnae at base; veins free, once-forked; fertile fronds bipinnate, narrow, ephemeral, axes densely covered in reddish-brown hairs.

  • Discussion

    Type. United States. “Marilandia,” Kalm s.n. (LINN 1244.12). Figs. 17E, F. Osmunda bipinnata Linnaeus, Sp. pl. 2: 1065. 1753. Type. Plumier, Traitéfoug. Amér.,t. 155. 1705, based on a plant from Hispaniola. The wholly dimorphic fronds and pinnate-pin-natifid sterile blade distinguish this species.

  • Distribution

    Swampy areas, often in the open, or in light woods by springs; Villa Alta; 1850 m. Mexico (Ver, Oax, Chis, Tab); e US & Can; Guat, Hond, CR; Berm, Gr Antill; Col & Ven, to Peru, Parag, Braz; e Asia.

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