Selaginella nothohybrida Valdespino
Descripción
Stems rosette-forming, glabrous, not articulate, not flagelliform, not stoloniferous, 9–15 cm long, 0.5–1 mm diam., 1–4 times branched, branches flat and spreading when moist, curling inwards when dry (ball-like); rhizophores on proximal half of branches, 0.2–0.3 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, green above (in new growth), to yellowgreen, yellow, or brown (when old), without reddish patches; lateral leaves (on primary branches) imbricate, ovate, 1.4–2.3 X 0.8–1.4 mm, bases cordate, acroscopic bases strongly overlapping stems, margins broadly hyaline or whitish, abundantly ciliate, apices long-cuspidate to aristate, hyaline; median leaves (on primary branches) imbricate, ovate-lanceolate or lanceolate, 1–1.7 X (0.5–)0.7–1.2 mm, bases rounded, margins hyaline, apices short- to long-aristate, tips as in lateral leaves; axillary leaves ovate-lanceolate to lanceolate, bases cordate with two incurved, ciliate auricles, margins hyaline, ciliate, apices short- to longaristate; strobili quadrangular, 4–10 mm long; sporophylls monomorphic; megasporangia in two ventral rows; microsporangia in two dorsal rows and ventral tip of strobili; megaspores deep yellow, reticulate-rugose to long-papillate to short-baculate, 300–375 µm diam.; microspores orange, rugose to baculate, 25–32 µm diam.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
Gro (Bruce et al. 1495, MEXU, MICH; Calzada 15715, 16369, NY; Lozano 33, NY; Matuda s.n., MEXU; McVaugh 22170, MICH; Orcutt 2559, DS). Oax (Mickel 4097, NY). Pue (Bóege 1924, MEXU). Ver (Oro s.n., MEXU).A
Distribución
México (país) EndémicoA
Elevación
450 – 1800 mA
Ecología y Hábitat
In rock crevices on dry rock faces, or shady places on deciduous forest slopes.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella nothohybrida is easily distinguished from S. lepidophylla by its median leaves that have margins short-ciliate (vs. serrate to very short-ciliate), leaf apices long-acuminate to aristate (vs. acuminate to short-cuspidate), lateral leaves with acroscopic margins ciliate to fimbriate (vs. serrate to very shortciliate), lower leaf surfaces lacking reddish patches (vs. with reddish patches), sporophylls ovate-lanceolate (vs. deltate-ovate), and sporophyll bases strongly pubescent (vs. weakly puberulent). Selaginella nothohybrida can be distinguished from S. pallescens by its rosette-like habit (vs. mostly erect to sometimes rosettelike), median leaf bases slightly peltate and truncate to roundish, without auricles (vs. non-peltate, cordate, with two incurved auricles or sometimes only an outer one on main stem), sporophyll bases strongly pubescent (vs. glabrous), and sporopyll apices abruptly long-cuspidate to short-aristate (vs. gradually tapering, long-acuminate to long-aristate).A