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
Bibliografía
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]