Selaginella asprella Maxon
Descripción
Stems decumbent to short-creeping, to 10 cm long, forming cushion-like or loose mats, main stems dorsiventral, lateral branches radially symmetric, often strongly ascending, readily fragmenting, tips straight, 0.3–0.4 mm diam., not articulate, not flagelliform, not stoloniferous, irregularly branched 1–2 times; rhizophores borne throughout stem length, 0.2–0.3 mm diam.; leaves of one kind (isophyllous) throughout, tightly appressed, lanceolate to linear-lanceolate, (2–)2.5–4 X 0.5–0.7(–0.8) mm (smaller on young shoots), bases cuneate and decurrent or sometimes rounded and adnate on young shoots, pubescent (hairs often covering 1⁄4 of lamina length abaxially), margins ciliate, cilia transparent to whitish, spreading, apices attenuate or obtuse, aristate, aristae yellowish, whitish or hyaline, denticulate, 0.5–1.4 mm; strobili quadrangular, 0.4–1.5(–2) cm long; sporophylls monomorphic; megasporangia few, basal; microsporangia occupying most of strobilus; megaspores lemon-yellow, rugose to reticulate, 290–380 µm diam.; microspores light orange, 33–35 µm diam.A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
BCN (Moran 15276, ARIZ, MEXU, 15451, UC, 21132, MSC, 25602, UC; Wiggins 16658, ENCB).A
Elevación
2600 – 3100 mA
Ecología y Hábitat
On limestone ridges, dry rocky slopes, igneous rocks, rock crevices, exposed cliffs, or gravelly soil.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella asprella has readily fragmenting stems and has been reported in Mexico only in Baja California Norte, which sets it apart from the other selaginellas in the flora.A