Vittaria graminifolia Kaulf.
Descripción
Rhizomes horizontal, compact, 1–1.5 mm diam.; rhizome scales clathrate, 4–5 mm long, 0.8–1.3 mm wide, uniform in size and cell wall type, 2 cells wide only at terminal 3–4 cells of tip, 8–20 cells wide at scale bases; fronds to 30 cm long, 1.5–2 mm broad at broadest point, 1–1.5 mm wide proximally, margins not recurved; midribs not visible on either surface (lower surface flat between sori); paraphyses medium to dark red-brown, stout, 0.1 mm long, with enlarged apical cell (ovate, 2 times longer than wide); spores tetrahedral-globose; 2n=ca. 240 (unknown source).
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A
Forma de vida
EpífitaA
Ejemplar revisado
Chis (Purpus 6731, NY, UC). Gro (Martínez S. 888, MEXU). Hgo (Rzedowski 28696, ENCB). Jal (Mc-Vaugh 21332, NY). Méx (Hinton 6162, ENCB, NY). Mich (Arsène 5252, UC). Nay (González 867, MEXU, UAN). Mor (Lyonnet 778, MEXU, NY). Oax (Mickel 4106, NY, UC). Pue (Cruz Cisneros 1519, ENCB, NY). Qro (Díaz Barriga & Carranza 6554, MEXU). Sin (Breedlove 44951, CAS). Ver (Copeland herb. 160, MICH, UC).
Unverified, Doubtful, or Mistaken Reports. SLP (Schaffner 53, NY, provenance in doubt, see Rzedowski, 1959). Tab (reported by Magaña, 1992, possibly based on a misidentification). Tam (reported by Mickel & Beitel, 1988, but not verified; also reported by Sharp, 1954, and by Lof, 1980, from Rancho del Cielo).
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Unverified, Doubtful, or Mistaken Reports. SLP (Schaffner 53, NY, provenance in doubt, see Rzedowski, 1959). Tab (reported by Magaña, 1992, possibly based on a misidentification). Tam (reported by Mickel & Beitel, 1988, but not verified; also reported by Sharp, 1954, and by Lof, 1980, from Rancho del Cielo).
A
Elevación
(300 –)1200 – 3050 mA
Ecología y Hábitat
In wet montane forests, rarely at low elevations.A
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This is the commonest and most widespread species in the genus in Mexico, and it is especially common in middle and higher elevation montane rain forests of the Atlantic slope in Oaxaca and Chiapas. The Vittaria graminifolia complex (narrow fronds, tetrahedral spores, paraphyses with reddish brown, elongate, enlarged apical cells) needs careful study. The presence in V. bradeorum of dimorphic V. lineata-type rhizome scales and V. graminifolia-type tetrahedral spores has led to numerous misidentifications of specimens of these three species, especially if only the rhizome scales are examined. Vittaria graminifolia has wide, dark brown to reddish brown rhizome scales of uniform size without any part of the cell walls thickened, as well as a flattened lower blade surface without an evident midrib.
See V. bradeorum for additional comments.
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See V. bradeorum for additional comments.
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