Selaginella stenophylla A.Braun
Descripción
Stems creeping, greenish or stramineous, to ca. 35 cm long, 0.5–1.4 mm diam., not articulate, not flagelliform, not stoloniferous, 3–4 times branched; rhizophores restricted to proximal half or throughout stems, stout, 0.5–0.8 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves oblong to oblong-ovate, (1.5–)2–3.7 X (0.6–)1–1.5 mm, bases cordate, margins hyaline, acroscopic margins finely denticulate to entire, apices broadly acute to rounded, both surfaces glabrous, with conspicuous or obscure idioblasts; median leaves elliptic or elliptic-ovate, 1.3–2 X 0.6–1.2 mm, bases biauriculate, margins hyaline, long-ciliate along proximal half, especially along the inner margin, short-ciliate to denticulate distally, apices abruptly aristate, aristae 1⁄4 to 1⁄2 the lamina length, 0.3–0.8 mm long, both surfaces glabrous, upper surfaces with conspicuous idioblasts; axillary leaves lanceolate to ovate-lanceolate, bases cordate; strobili lax and flattened, dorsiventral, 3–10 mm long; sporophylls dimorphic, the dorsal ones green, spreading, the ventral ones hyaline to pale green, ascending; megasporangia in two ventral rows; microsporangia in two dorsal rows; megaspores white, infrequently cream to brownish, granular-striate or striate-reticulate, with low to high reticulum, 330–356 µm diam.; microspores orange.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
Chis (Ishiki et al. 2025, NY). Hgo (Wiggins 13336, DS). NL (Wright s.n., PH). Pue (Fröderström & Hultén 750, NY). Qro (Rzedowski 43867, NY). SLP (Pennell 17995, PH). Tam (Nee & Diggs 24511, NY). Ver (Purpus 128, PH).A
Elevación
150 – 1300 mA
Ecología y Hábitat
In shaded, damp areas, on limestone slopes, and on mossy rocks.A
Tipo de vegetación
Bosque de neblina/mesófilo, Selva baja, Selva medianaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The very long, creeping stems, mostly oblong lateral leaves with broadly acute to rounded apices, median leaves each with a well developed outer auricle, and stout rhizophores 0.5–0.8 mm distinguish S. stenophylla from all other Mexican species.A