Selaginella pilifera A.Braun
Descripción
Stems rosette-forming, flat when moist, almost flat when dry, glabrous, not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores restricted to bases of rosette, 4–5 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, thick and stiff; lateral leaves imbricate, elliptic to ellipticovate, (2–)3–3.5 X 0.8–1 mm, bases cordate, margins hyaline, short-ciliate proximally, denticulate distally, apices aristate, aristae 1⁄3–1⁄2 the lamina length; median leaves oblique-lanceolate, 2–3 X 0.7–1 mm, bases peltate, rounded to truncate, margins green to slightly hyaline, denticulate, short-ciliate at bases, apices aristate, aristae 1⁄3 the lamina length; axillary leaves lanceolate, bases cordate, exauriculate, margins short-ciliate at bases, mostly denticulate, apices long-acuminate; strobili quadrangular, 5–10 mm; sporophylls monomorphic; megasporangia basal in ventral rows; microsporangia in dorsal rows, also in ventral rows distally; megaspores yellow, ca. 250 µm diam.; microspores orange; 2n=20.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
Chih (Pringle 886, NY). Coah (Arsène 10677, US; Rollins & Tryon 58156, US). Dgo (Torke et al. 155, NY). Hgo (Tejero-Diez 4057, IZTA). NL (Frye & Frye 2466, NY, UC, US; Pringle 13959, ARIZ). Qro (Díaz-Barriga & Carranza 7477, NY; Sohmer 9235, MEXU, NY). SLP (King 3873, NY, US; Rzedowski 11493, ENCB, NY). Tam (Johnston 12784, UC; Sharp et al. 52211, US).A
Elevación
475 – 2000 mA
Ecología y Hábitat
On dry rocky soil, rock crevices, limestone rocks, and cliff faces.A
Tipo de vegetación
Matorral de otro tipo, Selva bajaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The long-bristled leaf apices of Selaginella pilífera are unique among New World xerophytic members of series Circinatae Spring. The closest relative of S. pilífera is S. gypsophila, which differs by having obtuse leaf species. Further studies are needed to determine whether S. gypsophila represents a well differentiated species or an environmental variant of S. pilífera.A