Osmunda spectabilis Willd.
Descripción
Rhizomes massive, compact, horizontal to suberect, apices with long hairs; fronds 35–180 cm long, hemidimorphic, the fertile part occupying the distal 1⁄4–1⁄3 of the blades and greatly constricted (lacking green laminar tissue); stipes 1⁄3–1⁄2 the frond length, glabrous, stramineous to reddish brown, darker at base; blades bipinnate, 20–35 cm wide, elliptic, broadly lanceolate; pinnae with a conform terminal pinnule, chartaceous to subcoriaceous, glabrous at maturity; pinnules distant, very shortly petiolulate (less than 1 mm) to sessile at blade tip, narrowly elliptic, bases rounded to subcordate, entire to subcrenulate, apices obtuse to acute, glabrous at maturity; veins 2-forked; 2n=44 (Chis, CR).A
Forma de vida
TerrestreA
Ejemplar revisado
(Related to the synonym Osmunda regalis var. spectabilis) Chis (Breedlove 21253, DS, MEXU, NY). Gro (Lorea 1943, FCME). Hgo (Ramírez & Pérez G. 677, MEXU). Jal (Mexia 1822, CAS, DS, NY, UC, US). Méx (Hinton 5394, DS, MEXU, NY, UC). Mich (García & Díaz B. 3875, IEB). Nay (Palmer 1947, NY, US). Oax (Mickel 4972, NY, UC). Pue (Sharp 45348, MEXU, US). Tab (Cowan 3100, CAS, MEXU, NY). Ver (Ventura A. 18385, CAS, IEB, MEXU).
Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 2828, and one other collection, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified). Qro (Ameneyro s.n., ENCB, cited by Díaz-Barriga & Palacios Rios, 1992, but not verified).A
Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 2828, and one other collection, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified). Qro (Ameneyro s.n., ENCB, cited by Díaz-Barriga & Palacios Rios, 1992, but not verified).A
Elevación
(250 –)900 – 1800(– 2700) mA
Ecología y Hábitat
Swampy areas in the open or light woods, near barranca.A
Tipo de vegetación
Bosque de neblina/mesófilo, Bosque de pino-encinoA
Categoría IUCN
Preocupación menor (LC)B
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Osmunda regalis var. spectabilis) This variety seems to occur throughout the New World. Fronds and fertile panicles are more open, the stipes and rachises less stout, and the blades less coriaceous than var. regalis, which was recently typified by Jonsell and Jarvis (in Jarvis et al., 1993) on the basis of Herb. Burser vol. 20: 26 (UPS, microfiche UC!). New World material looks distinct enough to be treated as a different species from O. regalis sensu stricto (Old World), but more study of both herbarium and living material is needed to properly delimit these taxa.
In Mexico, O. regalis is far more common and widespread than O. cinnamomea, but there are nearly as many collections from Chiapas (about 35) as from all remaining states.A
In Mexico, O. regalis is far more common and widespread than O. cinnamomea, but there are nearly as many collections from Chiapas (about 35) as from all remaining states.A