Selaginella bigelovii Underw.
Descripción
Stems forming clumps, radially symmetric, underground (rhizomatous) and aerial, not readily fragmenting, irregularly branched, not articulate, not flagelliform, not stoloniferous; rhizomatous and aerial stems often with one branch arrested, budlike, tips straight; aerial stems erect or occasionally ascending; rhizophores restricted to rhizomes and proximal 1⁄3 of aerial stems, 0.3–0.4 mm diam.; leaves of one kind (isophyllous) throughout; rhizomatous stem leaves persistent, tightly appressed, scale-like; aerial stem leaves appressed, ascending, green, linear-lanceolate to narrowly lanceolate, 2.2–3.8 X 0.3–0.4(–0.8) mm, bases abruptly adnate, cordate to almost peltate, pubescent or sometimes glabrous, margins short-ciliate at leaf bases, denticulate distally, cilia 0.02–0.08 mm long, white to transparent or greenish, leaf apices aristate, aristae hyaline to whitish, 0.2–0.8 mm; strobili quadrangular, (0.4–)1–1.5 cm; sporophylls monomorphic; megasporangia in two ventral rows; microsporangia in two dorsal rows; megaspores lemon-yellow, reticulate or rugose to smooth (when old), 300–340 µm diam.; microspores orange.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
BCN (Moran 20495, UC, 24534, ENCB; Raven et al. 12284, UC; Wiggins & Wiggins 14843, MEXU). BCS (Brandegee 672, NY, UC; Carter & Ernst 494, MEXU; Carter et al. 2050, ARIZ, MEXU, UC; Wiggins et al. 494, UC).A
Elevación
200 – 2400 mA
Ecología y Hábitat
On exposed rock crevices, steep north-facing slopes, cliffs, boulders, sandstone or igneous
rocks, serpentine, or gravelly soils.A
rocks, serpentine, or gravelly soils.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella bigelovii is closely related to S. rupincola, but their ranges do not overlap.A