Selaginella simplex Baker
Descripción
Stems ascending to suberect, stramineous to greenish, 0.6–5 cm long, 0.1–0.3 mm diam., not articulate, not flagelliform, not stoloniferous, 1–2 times branched; rhizophores restricted to the proximal 1⁄3 of stems, filiform, ca. 0.1 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves ovate to ovate-elliptic, 1.3–1.6 X 0.8–1 mm, bases rounded, the acroscopic margins greenish, short-ciliate proximally, denticulate distally, apices acute to acuminate, both surfaces glabrous, without idioblasts; median leaves lanceolate to ovate-lanceolate, 0.6–1.2 X 0.2–0.4 mm, bases rounded, margins greenish, denticulate, apices long-acuminate to aristate, aristae 1⁄3–1⁄2 the lamina length, 0.2–0.3 mm, both surfaces glabrous, without conspicuous idioblasts; axillary leaves similar to lateral leaves, bases rounded, exauriculate; strobili lax, flattened, dorsiventral, 1.8–6.4 mm long; sporophylls dimorphic, the dorsal ones green, spreading, the ventral ones hyaline, ascending; megasporangia in two ventral rows; microsporangia usually in two dorsal rows, or dorsal sporophylls sterile; megaspores pale yellow, frequently with an equatorial flange, the proximal face granulose-tuberculate or rugulate, the distal face reticulate with open to closed reticulum of low ridges, 260–300 µm diam.; microspores orange.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
Gro (Lorea 4808, NY). Nay (Feddema 2660, MICH). Oax (Tryon & Tryon 7389, GH p.p.; Mickel 3996a, NY).A
Elevación
600 – 1000 mA
Ecología y Hábitat
In wet ravines on shaded and wet rock ledges, on dry and open river banks, and on banks in hillside savannas.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella simplex is very similar in size and general morphology to S. minima, and in the past they have been confused (Valdespino, 1993). Selaginella simplex can be distinguished from S. minima by having greenish (vs. hyaline) leaf and sporophyll margins, upper surfaces of lateral leaves and sporophylls without (vs. frequently with) conspicuous stomata and short hairs, and pale yellow (not white) megaspores with the proximal face granulate-tuberculate (not striate, reticulate, or rugulate).A