Asplenium riparium Liebm.
Descripción
Roots coarse, fibrous, not proliferous; rhizomes long- to shortcreeping; rhizome scales obscure, red-brown, clathrate, 0.5–2 X 0.2–0.3 mm, entire; fronds few, 0.5–1 cm apart, 25–60 cm long; stipes brown, dull, 12–30 cm X 2–3 mm, 1⁄3–1⁄2 of frond length, glabrous or with rare clathrate scales at bases, with green-brown wings 0.3–1 mm wide, flattened and wider proximally (to 4 mm); blades herbaceous, lanceolate, 1-pinnate, 16–35 X 7–15(–21) cm, reduced proximally, apex of each blade with a large hastate conform terminal pinna, not proliferous; rachises dark green, dull, glabrous, with wings 0.3–1 mm wide; pinnae trapezoidal to lanceolate or falcate, 7–15 pairs, proximal 1–3 pairs slightly reduced, 1–8(–11) X 1–2 cm, stalked to 4 mm, inequilateral, basiscopic sides excavate, acroscopic sides sometimes auriculate, apices usually acute to acuminate, margins coarsely and irregularly sharply serrate or crenate-serrate; veins mostly 2-forked, visible on both sides of blades, vein ends slightly widened and prominent adaxially; indument abaxially of scattered, appressed, clavate hairs 0.1 mm long; sori 3–11 pairs per pinna, on both sides of midveins; indusia brown, 4–9 X 0.5–1 mm, margins entire; spores reniform, 64 per sporangium (Murakami & Moran, 1993); 2n=78–80(Chis).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 32617, DS, NY, 35410, DS; Matuda 221, MEXU, US). Oax (Hernández G. 1749, CAS, MO; Mickel 5918, NY, UC, 6580, NY, UC). Pue (Campos V. 401, IEB; Riba et al. 318, NY). Ver (Purpus 2846, MO, NY, UC; Ventura A. 3267, CHAPA).A
Elevación
150–2100 mA
Ecología y Hábitat
Frequently on rocks in streams, especially on the Atlantic slope.A
Tipo de vegetación
Selva alta, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The name A. repandulum, previously used for this species in Mexico (Smith, 1981; Mickel & Beitel, 1988), was restricted to specimens from Ecuador and Peru by Murakami and Moran (1993). They regarded A. riparium as belonging to sect. Hymenasplenium. Morton and Lellinger (1966) reported A. riparium (as A. repandulum) as an epiphyte; however, the Mexican specimens appear to be terrestrial or epipetric in or along streams.
This and the closely allied A. obtusifolium L., from Panama, Greater and Lesser Antilles, Colombia, Venezuela, and Trinidad, both grow on wet rocks, are fleshy and dry blackish, have flattened stipes, creeping rhizomes, and somewhat irregular blade dissection. Asplenium obtusifolium has smaller fronds 15–20(–25) cm long, shorter, more obtuse, somewhat flabellate, pinnae 1.5–3.5 cm long, and proximal 1–4 pinnae each with a free acroscopic basal lobe.
A
This and the closely allied A. obtusifolium L., from Panama, Greater and Lesser Antilles, Colombia, Venezuela, and Trinidad, both grow on wet rocks, are fleshy and dry blackish, have flattened stipes, creeping rhizomes, and somewhat irregular blade dissection. Asplenium obtusifolium has smaller fronds 15–20(–25) cm long, shorter, more obtuse, somewhat flabellate, pinnae 1.5–3.5 cm long, and proximal 1–4 pinnae each with a free acroscopic basal lobe.
A