Asplenium praemorsum Sw.
Descripción
Roots coarse, fibrous, not proliferous; rhizomes suberect; rhizome scales dark brown, clathrate, 4–7 X 0.4–0.6 mm, with long, filiform, uniseriate tips, entire; fronds clumped, 10–50 cm long; stipes black to brown, dull, 10–14 cm X 1–2(–3) mm, 1⁄4–2⁄3 of frond length, with abundant black-brown lanceolate to hair-like, often twisted scales mostly 2–5 mm long, not winged; blades thick-chartaceous to subcoriaceous, ovate to lanceolate, 2-pinnate to 2-pinnate-pinnatifid, 12–45 X 4–10 cm; rachises black abaxially, green adaxially, with scattered, basally fimbriate or pectinate scales 1–3 mm long, not winged; pinnae lanceolate to deltate, mostly 7–15 pairs, 2–11 X 1–3 cm, proximal ones stalked 2 mm or more, acute, pinnate, 3–7 segments (pinnules) per proximal pinna, segments obovate or obtriangular, sometimes lacerate, deeply incised, or with fine teeth at apices; veins arising at very narrow angles (5–20°) from the main vein of a segment, 4–8 per ultimate segment, tips not evident adaxially, but veins at least faintly visible on both blade surfaces; indument abaxially of dense to scattered narrow scales 1–3 mm long; sori mostly 1–5 per pinna lobe (pinnule); indusia entire, 3–12 X 0.3–0.5 mm; spores reniform; 2n=288 (Jam).A
Forma de vida
Epífita or epipetricA
Ejemplar revisado
Chis (Alava 1260, UC). Col (Vázquez 653, UC). DF (Orcutt 4297, DS, MO, NY). Dgo (Tenorio L. 6151, MEXU). Gro (Mexia 9044a, UC). Gto (Rzedowski 51235, IEB). Hgo (Sánchez Mejorada R. 684, MEXU). Jal (Bueno 17102, UC). Méx (Moore & Cetto 5461, UC, US). Mich (Pringle 3363, DS, MEXU, MO, NY, UC, US). Mor (Lyonnet 1843, CAS, US). Nay (Díaz L. 16311, IBUG, UC). Oax (Mickel 3750, UC). Pue (Purpus s.n., UC). Qro (Carranza 1050, ENCB, IEB, MEXU). SLP (Boutin 3397, MEXU, NY, US). Sin (Breedlove 44947, CAS, ENCB). Tam (Sharp et al. 52165, US). Ver (Miller & Torres 2979, MO, UC).
Unverified, Doubtful, or Mistaken Reports. Ags (González-Adame s.n., HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Ags (González-Adame s.n., HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Elevación
700–3000(–3400) mA
Tipo de vegetación
Bosque de pino-encinoA
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The conspicuously scaly stipes and rachises, 2-pinnate blades, and low angle of minor vein divergence from main veins distinguish A. praemorsum from congeners in Mexico. The close relationship of this taxon with the African A. aethiopicum (Burm.) Becherer (A. furcatum Thunb., A. adiantoides Lam.) needs further study (Morton & Lellinger, 1966; Smith, 1981). Braithwaite (1986) synonymized A. praemorsum under A. aethiopicum, and this judgment was followed by Adams (in Davidse et al., 1995: 295). Most specimens of A. aethiopicum from Africa, especially from South Africa (the type locality) are more dissected (3-pinnate), have broader blades, and have narrower ultimate segments (cf., e.g., the illustration in Jacobsen, 1983: 361), than neotropical (especially Mexican and Mesoamerican) material and do not appear to be conspecific. For that reason we maintain both species and use the name A. praemorsum for Mexican plants.
Asplenium cuneatum Lam., known from Guatemala (Contreras 3015, 4701, LL), is related to A. praemorsum, and might be expected in Chiapas.
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Asplenium cuneatum Lam., known from Guatemala (Contreras 3015, 4701, LL), is related to A. praemorsum, and might be expected in Chiapas.
A