Selaginella breedlovei Valdespino
Descripción
Selaginella orizabensi affinis, a qua imprimis differt foliis medianis lanceolatis, basibus obliquis, foliis lateralibus apicibus acuminatus, breviciliatis secus 1⁄3 basium. (Dedicated to Dennis Breedlove, pre-eminent collector of Chiapan plants.)
Stems creeping, stramineous distally, reddish proximally, ca. 17 cm long, 0.3–0.4 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores limited to basal third of plant, filiform, 0.1–0.2 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, imbricate, lustrous, red proximally; lateral leaves ovate to ovate-oblong, 1.5–2.3 X 0.7–1.2 mm, acroscopic bases rounded, strongly overlapping the stems, margins hyaline, denticulate, short-ciliate on acroscopic base, apices acuminate, upper surfaces hispid, without idioblasts, lower surfaces glabrous, with or without obscure idioblasts; median leaves lanceolate, 0.7–2.1 X 0.3–0.7 mm, margins hyaline, the inner margins short-ciliate proximally, denticulate distally, outer margins entire or denticulate along distal 1⁄4, apices long-aristate, both surfaces glabrous, without idioblasts; axillary leaves similar to lateral leaves or more ovate-lanceolate, bases rounded, 1.4 X 0.7 mm; strobili quadrangular to slightly dorsiventral, 1–5 mm long; sporophylls monomorphic; megasporangia few, on ventral side of strobili; microsporangia occupying most of strobili; megaspores light yellow, 200–250 µm diam.; microspores orange.A
Stems creeping, stramineous distally, reddish proximally, ca. 17 cm long, 0.3–0.4 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores limited to basal third of plant, filiform, 0.1–0.2 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, imbricate, lustrous, red proximally; lateral leaves ovate to ovate-oblong, 1.5–2.3 X 0.7–1.2 mm, acroscopic bases rounded, strongly overlapping the stems, margins hyaline, denticulate, short-ciliate on acroscopic base, apices acuminate, upper surfaces hispid, without idioblasts, lower surfaces glabrous, with or without obscure idioblasts; median leaves lanceolate, 0.7–2.1 X 0.3–0.7 mm, margins hyaline, the inner margins short-ciliate proximally, denticulate distally, outer margins entire or denticulate along distal 1⁄4, apices long-aristate, both surfaces glabrous, without idioblasts; axillary leaves similar to lateral leaves or more ovate-lanceolate, bases rounded, 1.4 X 0.7 mm; strobili quadrangular to slightly dorsiventral, 1–5 mm long; sporophylls monomorphic; megasporangia few, on ventral side of strobili; microsporangia occupying most of strobili; megaspores light yellow, 200–250 µm diam.; microspores orange.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 22558, DS).A
Distribución
México (país) EndémicoA
Elevación
200 mA
Ecología y Hábitat
On riverbanks.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is characterized by having the stems reddish proximally and covered with imbricate, lustrous red leaves, acroscopic half of the lateral leaves almost twice as wide as the basiscopic half; and aristae of median leaves 1⁄3 to 1⁄2 as long as the lamina length. In addition, some stems of S. breedlovei seem to arise from red buds that develop at the tips of flagelliform branch apices.
Selaginella breedlovei may be closely related to S. orizabensis, from which it can be distinguished by the characters given in the key. Specimens of S. breedlovei were treated by Smith (1981) as S. flagellata.
A
Selaginella breedlovei may be closely related to S. orizabensis, from which it can be distinguished by the characters given in the key. Specimens of S. breedlovei were treated by Smith (1981) as S. flagellata.
A