Osmundastrum cinnamomeum (L.) C.Presl
Descripción
Rhizomes stout, horizontal, with hairs and old leaf bases; fronds 0.5–1.5 m long, holodimorphic; stipes 1⁄3 the frond length, stramineous, darker at base, glabrous or with some soft, lax, cinnamon hairs; sterile blades pinnate-pinnatifid, 35–100 X 20 cm, elliptic to ovate-lanceolate, gradually narrowed into a pinnatifid apex, chartaceous to subcoriaceous; pinnae opposite to subopposite, glabrous except for tuft of short hairs at base of each pinna abaxially, sessile, to 13 X 1.5–4 cm, spreading to ascending; pinnules slightly ascending or falcate, margins entire, broadly acute at tip, short hairs scattered on veins and margin of pinnae at base; veins free, 1-forked; fertile blades bipinnate, narrow, ephemeral, axes densely covered with reddish brown hairs; 2n=44 (Jam, CR).A
Ejemplar revisado
(Related to the synonym Osmunda cinnamomea) Chis (Breedlove 22198, DS, MEXU, MO, NY; Ghiesbreght 300, K, NY). Oax (Mickel 902, NY, US; Rivera Reyes 242, MEXU). Pue (Miranda 3428, MEXU; Sharp 45349, US). Ver (Liebmann s.n., Feb 1842, GH, photo XAL!).
Unverified, Doubtful, or Mistaken Reports. Tab (reported by Mickel & Beitel, 1988, and by Magaña, 1992, but not verified).A
Unverified, Doubtful, or Mistaken Reports. Tab (reported by Mickel & Beitel, 1988, and by Magaña, 1992, but not verified).A
Elevación
900 – 1900 mA
Ecología y Hábitat
Swampy areas, often in the open, or in light woods by springs, in swamp at edge of canyon.A
Categoría IUCN
Preocupación menor (LC)B
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Osmunda cinnamomea) The wholly dimorphic fronds and pinnate-pinnatifid sterile blades distinguish this species from O. regalis. Serbet and Rothwell (1999) reported fossils of this species from the Upper Cretaceous of western North America that resemble the extant plants so closely that they cannot be distinguished.A