Asplenium pseuderectum Hieron.

Primary tabs

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 crecimiento

Hierba

Forma de vida

Epipétrica, EpífitaA

Nutrición

Autotrófica

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

Distribución

Caribe PresenteA, Centroamérica: Belice PresenteA; Costa Rica PresenteA; Guatemala PresenteA; Honduras PresenteA; Nicaragua PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA

Elevación

150 – 600 mA

Ecología y Hábitat

On boulders near water, or mossy tree trunks.A

Tipo de vegetación

Selva altaA

Categoría IUCN

No incluidaB

Categoría NOM-059-SEMARNAT-2010

No incluidaC

Estatus del taxón

(A) Como definida actualmente, probablemente una entidad natural (monofilética)

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

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
B. IUCN 2022: The IUCN Red List of Threatened Species. Versión 2022-2
C. SEMARNAT 2019: MODIFICACIÓN del Anexo Normativo III, Lista de especies en riesgo de la Norma Oficial Mexicana NOM-059-SEMARNAT-2010: 101 pp. – https://www.dof.gob.mx/nota_detalle.php?codigo=5578808&fecha=14/11/2019#gsc.tab=0 [accessed 2023-05-04 06:16]