Selaginella apoda Spring
Descripción
Stems prostrate to short-creeping, forming rather loose or clustered mats 3–7 cm long, 0.3–0.5 mm diam., greenish to stramineous, not articulate, not flagelliform, not stoloniferous, sparsely branched, the branches mostly simple or 1-forked; rhizophores borne throughout stem length or restricted to proximal 1⁄3, less than 0.1 mm diam.; leaves of two kinds (anisophyllous) throughout; lateral leaves ovate to ovate-lanceolate, 1.4–2.3 X 0.8–1.4 mm, bases rounded, margins green or with 1 row of hyaline cells, denticulate, apices acute; median leaves lanceolate, surfaces glabrous, 1–1.6 X 0.4–0.7 mm, bases rounded, margins sparingly denticulate or subentire, apices acuminate to longacuminate; axillary leaves similar to lateral ones, exauriculate; strobili lax and dorsiventral, 1–2 cm long; sporophylls subdimorphic, dorsal ones spreading, ventral ones ascending; megaspores pale yellow to bone-white, reticulate, 330–390 µm diam.; microspores orange, rugulose-reticulate to verruculose, 25–30 µm diam.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 21287, DS, NY, 39780, DS, ENCB, NY; Little & Sharp 9876, US; Münch s.n., DS). Hgo (Pringle 8797, ARIZ, CAS, MSC, NY, UC, US). Mich (García & Díaz Barriga 3854, NY; Rzedowski 48537, NY; Zamudio & Becerra 10440, NY). Pue (Pringle 10815, ARIZ, CAS, LL, MICH, MSC, UC, US). Ver (Nee & Taylor 26781, F, NY).A
Elevación
1700 – 2700 mA
Ecología y Hábitat
In swamps, meadows, marshes, pastures, damp lawns, shaded slopes, light woods, and stream banks, in basic to acidic soil conditions.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella apoda is the central component of a taxonomically difficult species complex of the eastern and southeastern United States. Its closest relative is S. eclipes W. R. Buck. It is also related to S. ludoviciana (A. Braun) A. Braun, from which it can be distinguished by its green or less often narrowly hyaline leaf margins, stomata scattered throughout the leaves, tendency to form rather short mats of prostrate or creeping stems, and rugulose-reticulate to verruculose microspores. Selaginella ludoviciana has lateral leaves with hyaline margins 3–5 cells wide, stomata restricted to the midrib region, long-creeping to ascending stems, and rather smooth microspores.A