Selaginella subrugosa Mickel & Beitel
Descripción
Stems prostrate, stramineous to pale green, 5–12 cm long, 0.6–0.8 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores borne throughout stem length, stout, ca. 0.3 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves on main stems oblong, 1.8–2.5 mm long, bases rounded, margins minutely denticulate, apices acute, sometimes with short idioblasts below, verruculose on upper surfaces; median leaves ovate, bases rounded, margins white and denticulate, surfaces rugulose, apices short-aristate, aristae 0.3–0.5 mm long, 1⁄4 the lamina length; axillary leaves ovate to lanceolate, exauriculate, denticulate at bases; strobili quadrangular, 8–15 mm long; sporophylls monomorphic and of two colors, dorsal rows green, ventral rows pale green; megasporangia in two ventral rows, smaller strobili often completely microsporangiate; microsporangia in two dorsal rows; megaspores white, with faint markings, 250–350 µm diam.; microspores light orange, with slender, often capitate papillae.A
Forma de vida
TerrestreA
Ejemplar revisado
Oax (Mickel 1579, NY, US, 1589, 4795, NY, UC, 5682, NY, 5766, 5933, 7084, 7128, NY, UC; Rzedowski 33391, ENCB, 34057, IEB).A
Distribución
México (país) EndémicoA
Elevación
800 – 1600 mA
Tipo de vegetación
Selva alta, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella subrugosa is intermediate between S. flexuosa (q.v.) and S. corrugis, and differs from the former in having thinner rhizophores (0.3 mm diam.), suborbicular median leaves with short aristae (0.3–0.5 mm) and somewhat verruculose upper surfaces, and lateral leaves smaller (1.8–2.5 mm long) and more ovate. Selaginella corrugis has thinner rhizophores, smaller, orbicular, verruculose, short-cuspidate median leaves, and ovate lateral leaves only 1–1.2 mm long. Selaginella subrugosa is known only in Oaxaca, where it grows with S. flexuosa (Mickel 5932, 7083, NY).A