Phanerophlebia umbonata Underw.
Descripción
Rhizomes short-creeping to ascending, often branched; rhizome scales concolorous, brown, ovate, 2.5–4.5 X 2–4 mm, margins ciliate; fronds (20–)40–90 cm long; stipes 1⁄3–1⁄2 the frond length, stramineous, moderately scaly with tan, appressed often caducous scales similar to those of rhizomes; blades ovate to lanceolate, 13–50 cm long; rachises with sparse, tan, hair-like, twisted scales; buds absent from axils of distal pinnae; pinnae 7–18 pairs, ovate-oblong to usually linear-lanceolate, falcate, 4–15 X 1.5–2.6 cm, bases rounded to broadly cuneate to truncate, apices attenuate, lowermost pinnae inequilateral, excavate basiscopically, not auriculate acroscopically, margins spinulose-serrate throughout; veins free or only occasionally and sporadically anastomosing, 1–3-branched; sori in 2–3 series between costae and pinna margins, inner row 2–3 mm from costa, outer row often submarginal; indusia firm, light brown, 0.6–1 mm diam., convex with a raised darker umbo centrally, persistent and not shriveling at maturity; 2n=82 (USA, NL, SLP).A
Forma de vida
o epipétrica. TerrestreA
Ejemplar revisado
Coah (Wynd & Mueller 349, ARIZ, MEXU, NY; Lyonnet 421000001, CAS, MEXU; Stewart 1533, LL, US). NL (Pringle 13739, ARIZ, LL, TEX, UC, US). Qro (Rubio 1492, UAMIZ). SLP (Mickel 563, ENCB, NY; Pringle 3403, UAMIZ, UC). Tam (Bartlett 10095, NY, US; Stanford et al. 1069, ARIZ, NY, UC; Valdés R. 1940, NY, TEX).
Unverified, Doubtful, or Mistaken Reports. Chih (Jones s.n., CAS, cited by Yatskievych, 1996, but not verified).
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Unverified, Doubtful, or Mistaken Reports. Chih (Jones s.n., CAS, cited by Yatskievych, 1996, but not verified).
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Elevación
550 – 2000 mA
Ecología y Hábitat
On limestone cliffs, in moist, mesic, sheltered canyons and ravines, often on calcareous rocks.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is distinguished by having free veins, usually 10 or more pinna pairs, exauriculate pinnae, and firm, persistent, large indusia with a central umbo (nipple), hence the specific epithet umbonata. Phanerophlebia umbonata has, in general, more persistently scaly rachises than P. nobilis, a close relative. The range of P. umbonata is more or less confined to northeastern and north-central Mexico and southwestern Texas.
Yatskievych (1996) cited Gentry 8119 (MICH, UC), from Sonora, as representing this species, but the UC specimen seems to us to be P. nobilis.
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Yatskievych (1996) cited Gentry 8119 (MICH, UC), from Sonora, as representing this species, but the UC specimen seems to us to be P. nobilis.
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