Selaginella hirtifolia Valdespino
Descripción
A S. revoluta foliis medianis acutis vel breviter acuminatis et foliis lateralibus acutis differt. (L., hirtus, hairy, folium, leaf, referring to the hairy leaf surfaces.)
Stems creeping, greenish or stramineous, 3–17 cm long, 0.4–0.6 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores throughout, 0.1–0.3 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves broadly ovate-oblong, 1.5–2.5 X 0.8–1.3 mm, bases rounded to subcordate, margins whitish to hyaline or greenish, long-ciliate acroscopically, denticulate to entire distally and basiscopically, apices acute, upper surfaces corrugate and/or verruculose, hispid along the basiscopic half (particularly near margins), without idioblasts; median leaves ovate to broadly elliptic, 0.9–1.3 X 0.6–0.9 mm, bases subcordate, margins hyaline, longciliate to entire distally, apices acute to short-acuminate, upper surfaces corrugate and frequently verruculose, lower surfaces smooth, both surfaces without idioblasts; axillary leaves similar to lateral leaves, except margins ciliate in proximal 1⁄2 to 2⁄3, denticulate apically, bases rounded; strobili quadrangular, 3–10 mm long; sporophylls monomorphic; megasporangia few, ventral, at the base or center of the strobili and intermixed with microsporangia; microsporangia occupying most of the strobilus; megaspores snow-white, reticulate, with a low equatorial flange, 300–320 µm diam.; microspores orange, ca. 30 µm diam.A
Stems creeping, greenish or stramineous, 3–17 cm long, 0.4–0.6 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores throughout, 0.1–0.3 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves broadly ovate-oblong, 1.5–2.5 X 0.8–1.3 mm, bases rounded to subcordate, margins whitish to hyaline or greenish, long-ciliate acroscopically, denticulate to entire distally and basiscopically, apices acute, upper surfaces corrugate and/or verruculose, hispid along the basiscopic half (particularly near margins), without idioblasts; median leaves ovate to broadly elliptic, 0.9–1.3 X 0.6–0.9 mm, bases subcordate, margins hyaline, longciliate to entire distally, apices acute to short-acuminate, upper surfaces corrugate and frequently verruculose, lower surfaces smooth, both surfaces without idioblasts; axillary leaves similar to lateral leaves, except margins ciliate in proximal 1⁄2 to 2⁄3, denticulate apically, bases rounded; strobili quadrangular, 3–10 mm long; sporophylls monomorphic; megasporangia few, ventral, at the base or center of the strobili and intermixed with microsporangia; microsporangia occupying most of the strobilus; megaspores snow-white, reticulate, with a low equatorial flange, 300–320 µm diam.; microspores orange, ca. 30 µm diam.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 56803, CAS, ENCB; Riba et al. 1383, ENCB). Oax (Hernández 1160, ENCB, MEXU, MO, NY; Mickel 1477, NY 4761, NY, UC, 4790, NY). Tab (Cowan 3455, ENCB, MO, NY, UC).A
Distribución
México (país) EndémicoA
Elevación
50 – 2200 mA
Ecología y Hábitat
On wet banks in montane forests.A
Tipo de vegetación
Bosque de neblina/mesófilo, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella hirtifolia is characterized by the almost transparent to faintly green color of the ventral sporophylls. The presence of short hairs on the upper surfaces of the basiscopic half of the lateral leaves, particularly near the margins, distinguish S. hirtifolia from all other Mexican species except S. bernoullii, S. popayanensis, and S. porphyrospora. Selaginella hirtifolia is distinguished from these last three species by its ciliate (vs. denticulate) lateral and median leaves and sporophylls and its white (not orange) megaspores.
Specimens of S. hirtifolia were misinterpreted by Alston (1955), Smith (1981), Mickel and Beitel (1988), and Fraile (in Davidse et al., 1995) as S. lindenii. Differences between these two taxa are discussed under S. lindenii.
Selaginella hirtifolia is a member of the S. revoluta group. It differs from S. revoluta, the only other Central American member of this group, by its acute to short-acuminate (vs. longacuminate to aristate) median leaves and by its acute (vs. truncate to broadly acute) lateral leaf apices.
A
Specimens of S. hirtifolia were misinterpreted by Alston (1955), Smith (1981), Mickel and Beitel (1988), and Fraile (in Davidse et al., 1995) as S. lindenii. Differences between these two taxa are discussed under S. lindenii.
Selaginella hirtifolia is a member of the S. revoluta group. It differs from S. revoluta, the only other Central American member of this group, by its acute to short-acuminate (vs. longacuminate to aristate) median leaves and by its acute (vs. truncate to broadly acute) lateral leaf apices.
A