Asplenium pseuderectum Hieron.
Descripción
Roots fibrous, not proliferous; rhizomes suberect; rhizome scales generally brown, subclathrate to clathrate, 3–5 X 0.4–1 mm, entire; fronds clumped, 12–25(–35) cm long; stipes very short to almost obsolete, to 2 cm X 1 mm, 1⁄10 or less of frond length, glabrous, with green wings to 0.6 mm wide; blades thinly herbaceous, linear-elliptic to oblanceolate, 2.5–5 cm wide near or above the middle, gradually tapering proximally (lowermost pinnae scarcely more than auricles), abruptly caudate-acuminate at apices; rachises greenish to brownish, glabrous, green-winged, the wings 0.2–0.5 mm wide; pinnae narrowly deltate to lanceolate from strongly inequilateral bases, usually somewhat deflexed, mostly 25–35 pairs, 1.5–3 cm X 4–6 mm at bases, sessile, apices acuminate or somewhat obtuse, margins crenate-dentate on both sides and tips; veins simple except for the basal acroscopic ones, readily visible on both sides, tips evident adaxially; indument abaxially of scattered appressed, whitish to tan clavate hairs 0.1–0.2 mm long; sori 3–6 pairs per pinna, on both sides of costae; indusia 1–2 X 0.3–0.4 mm, membranous, margins entire; spores reniform.
Forma de vida
Epífita or epipetricA
Ejemplar revisado
Chis (Breedlove 26549, DS, MO, NY, 48393, CAS). Oax (Hallberg 1296, 1311, NY; Hernández G. 1221, CHAPA, NY); Mickel 6454B, NY). Ver (Sinaca C. 1000, IEB, MO).
A
A
Elevación
150–600 mA
Ecología y Hábitat
On boulders near water, or mossy tree trunks.A
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Proctor (1989) illustrated well the differences between this species and A. pteropus, which is the closest ally. Primarily, A. pseuderectum is distinguished by the proximal pinnae being greatly reduced and by stipes less than 2 cm long. The fronds of A. pseuderectum are also generally about half the size of those of A. pteropus. Adams (in Davidse et al., 1995) did not distinguish these two species in Flora Mesoamericana, so we have cited a representative specimen from each country where A. pseuderectum occurs.A