Selaginella minima Spring
Descripción
Stems ascending to suberect, stramineous to green, 1–9 cm long, 0.2–0.5(–0.8) mm diam., not articulate, not flagelliform, not stoloniferous, 1–3 times branched; rhizophores restricted to proximal 1⁄2 of stems, filiform, 0.1–0.2 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, frequently with sparse short hairs or glabrescent, without idioblasts; lateral leaves ovate to broadly ovate, 1.5–1.9 X 0.8–1.1 mm, bases rounded, the acroscopic bases strongly overlapping stems, margins hyaline or greenish, acroscopically long-ciliate to denticulate distally, basiscopically entire to denticulate, apices acute; median leaves ovate, 1–1.3 X 0.45–0.7(–0.8) mm, inner bases truncate, outer bases oblique, margins conspicuously hyaline, denticulate, or the outer margins short-ciliate proximally and denticulate distally and the inner margins denticulate, apices acute to longacuminate; axillary leaves similar to lateral leaves, except for longciliate margins along the proximal 1⁄4–1⁄2, exauriculate; strobili lax, flattened, dorsiventral, 2–5(–12) mm long; sporophylls dimorphic, the dorsal ones green, spreading, the ventral ones pale green to hyaline, ascending to spreading; megasporangia in two ventral rows or sometimes mixed in one of these rows with microsporangia; microsporangia usually in two dorsal rows, sometimes mixed with megasporangia in a ventral row; megaspores snow-white, with a slightly developed equatorial flange, rugulate, reticulate, 270–350 µm diam.; microspores tan, verruculose with small points, 45–50 µm diam.A
Forma de vida
TerrestreA
Ejemplar revisado
Oax (Mickel 4204, NY, UC; Tryon & Tryon 7389, 7389a, GH).A
Elevación
300 mA
Ecología y Hábitat
On dry and open wooded slopes, on clay banks in savannas and on shaded stream banks.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Because of its small size, S. mínima has been very often confused with S. simplex (Valdespino, 1993). See discussion under (S. simplex) for differences.A