Selaginella cuneata Mickel & Beitel
Descripción
Stems erect, stramineous to pale green, to 60 cm tall, to 2 mm diam., not articulate, not flagelliform, stoloniferous; rhizophores restricted to bases of stems, to 0.7 mm diam.; leaves uniform on main stems, anisophyllous otherwise, appressed below first branch, ovate, rounded at bases with finely denticulate margins, not curling at margins when dry, with conspicuous idioblasts only on median leaves; lateral leaves ovate on main stems, 3.5–4 mm long, narrowly ovate, on branchlets 1.5–2 mm long, bases rounded-subcuneate, entire to minutely denticulate, apices obtuse to acute; median leaves ovate, bases rounded to slightly oblique, margins entire or with a few minute ciliolate teeth, with two conspicuous idioblasts, acuminate to shortaristate; axillary leaves narrowly ovate to lanceolate, acute, exauriculate, bases cuneate to somewhat rounded, entire to minutely denticulate at bases; strobili quadrangular, 6–15 mm long; sporophylls monomorphic and of two colors, dorsal rows green, ventral rows colorless, ascending; megasporangia in basal 1⁄2 of ventral two rows; microsporangia in dorsal two rows and distally in ventral rows; megaspores white, with low narrow ridges, 190–240 µm diam.; microspores yellow-orange.A
Forma de vida
TerrestreA
Ejemplar revisado
Oax (Liebmann 2051, US frag., photo and drawing; Mickel 1044, NY).A
Distribución
México (país) Nativo y no endémicoA
Elevación
750 – 1150 mA
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella cuneata is very closely allied to S. oaxacana, differing most noticeably in the cuneate bases of the lateral and median leaves, the relative lack of idioblasts on lateral leaves, and the narrow strobili.A