Diplazium wendtii Mickel & A.R.Sm.

Primary tabs

Diplazium wendtii Mickel & A.R.Sm.

Descripción

Rhizomes erect; rhizome scales concolorous, brown-black, lustrous, lanceolate to ovate-lanceolate, to 4 X 1.5 mm, entire; fronds 90–100 cm; stipes tan to stramineous, to ca. 40 cm X 4 mm, 2⁄5 the frond length, with dark brown scales at very bases, otherwise glabrous; blades chartaceous, 3-pinnate-pinnatifid to 4-pinnate, to ca. 60 X 48 cm, ovate, apices pinnatifid, lacking buds; rachises stramineous, glabrous; pinnae 25+ pairs per blade, stalked 5–7 mm, 20 X 25 cm long, inequilateral, perpendicular or ascending ca. 80° from rachises, pinnules stalked ca. 2 mm, alternate, inequilateral, costules adaxially with green wings perpendicular to the plane of the blades forming deep grooves, pinnulets and some ultimate segments stalked to 1 mm, inequilateral, bases cuneate, margins toothed; veins free, pinnate in ultimate lobes, 2–4 pairs per segment; indument absent on all parts of the blades; sori pinnate in ultimate segments, with entire indusia 1.5–2.5 X 0.3 mm.A

Forma de crecimiento

Hierba

Forma de vida

TerrestreA

Nutrición

Autotrófica

Ejemplar revisado

Known only from the type specimen. Oax (Wendt et al. 5580, NY!, MEXU, TEX, UC!).A

Distribución

México (país) EndémicoA

Elevación

450 mA

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

Diplazium wendtii is distinguished by its highly dissected blades, pinnae perpendicular or nearly so with respect to the rachises, petiolulate inequilateral pinnae, pinnules and pinnulets, and very small ultimate segments. Of Mexican diplaziums, only D. gomezianum approaches D. wendtii in blade dissection, both species being at least 3-pinnate to 3-pinnate-pinnatifid; all other Mexican diplaziums have less dissected blades. Diplazium gomezianum also differs in having opposite to subopposite pinnules that are nearly equilateral at their bases, as well as at least some hairs or scales on the laminae abaxially, at least at the segment bases.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]