Selaginella rzedowskii Lorea-Hern.
Descripción
Stems creeping, brown in older portions and green in younger tips and branches, 4–20 cm long, 0.4–0.7 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores borne throughout stem length, dark brown, 0.2–0.3 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, lustrous; lateral leaves ovate to ovate-oblong, 1.8–2.7 X 0.8–1.3 mm, bases rounded, strongly overlapping stems, margins obscurely differentiated, ciliate proximally, denticulate or entire distally, apices obtuse, surfaces glabrous, without idioblasts; median leaves lanceolate, 1.5–2.1 X (0.6–)0.7–0.9 mm, bases rounded, margins obscurely differentiated to green, short-ciliate proximally, denticulate or entire distally, apices acute to obtuse; axillary leaves similar to lateral ones, bases cordate, exauriculate; strobili quadrangular, (4–)7–13(–17) mm long; sporophylls monomorphic; megasporangia in two ventral rows; microsprorangia in two dorsal rows; megaspores lemon-yellow, striate to reticulate with high muri, 400–470 µm; microspores pale orange to deep yellow, shed in tetrads, tetrads ca. 50 µm diam.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
Gro (Barkley & D. J. Carr 36145, GH; Contreras 338, XAL, 609, NY; Frye & Frye 2578, NY, UC).A
Distribución
México (país) EndémicoA
Elevación
450 – 1000 mA
Ecología y Hábitat
On limestone rocks in rocky soil in seasonally dry forests.A
Tipo de vegetación
Selva baja, Selva medianaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Selaginella rzedowskii is distinct from S. flexuosa by the former having median leaves acute with ciliate bases (vs. long-aristate with glabrous bases), rhizophores dark brown and borne on the upper side of stems (vs. stramineous to green and borne on the lower side of stems), and megaspores pale orange to deep yellow (vs. white).A