Selaginella delicatissima A.Braun
Descripción
Stems prostrate with slightly ascending branches to suberect, stramineous or commonly with reddish patches, to 35 cm long, 0.6–0.9 mm diam., not articulate, not flagelliform, not stoloniferous, 3–5 times branched, leafy branches concave on upper surface, their leaves curving upward at their tips; rhizophores throughout or along only the length of the main stems, lateral branches sometimes lacking rhizophores, filiform, 0.15–0.2 mm diam.; leaves of two kinds (anisophyllous) throughout stem length; lateral leaves obliquely oblong, 2–3 mm long, bases subcordate with the upper lobe overlapping the stem, margins longciliate, especially on the acroscopic edges, denticulate distally, curving upward (appearing concave from above), old leaves often orange or red, apices acute; median leaves lanceolate, uniauriculate to sub-biauriculate, margins short- to long-ciliate at bases, denticulate distally, apices acuminate to short-aristate; axillary leaves oblong, bases biauriculate with short, blunt, subparallel auricles, margins with a few long cilia, especially near the bases, apices acute to obtuse; strobili quadrangular, 6–9 mm long; sporophylls monomorphic; megasporangia several, in lower 1⁄2 of ventral two rows; microsporangia in two dorsal rows and distally in ventral rows; megaspores yellow, with low papillae merging and forming short ridges, 350–400 µm diam.; microspores orange, with many short, blunt papillae.A
Forma de vida
TerrestreA
Ejemplar revisado
Chih (Benítez 1904, MEXU). Col (Jones 486, US). Dgo (Knobloch 2139, MSC). Gro (Rzedowski 48085, NY). Gto (Rzedowski 41570, NY). Hgo (Moore & Wood 4428, US). Jal (Pringle 2634, US). Méx (Mickel 719, NY). Mich (King & Soderstrom 5036, MEXU, NY, TEX, US). Mor (Rose & Painter 7250bis, US). NL (Pringle 1978, ARIZ, NY, UC). Oax (Mickel 1596, NY, US). Qro (Rzedowski 48085, NY). SLP (Pringle 3296, NY, UC). Sin (Correll & Correll 28870, US). Tam (Bartlett 11046, ENCB, LL, NY, US). Ver (Purpus 2388, ARIZ, NY, US).
Unverified, Doubtful, or Mistaken Reports. Ags (De la Cerda & García 995, García 2358, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Ags (De la Cerda & García 995, García 2358, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Elevación
900 – 2500 mA
Ecología y Hábitat
On moist banks in exposed or lightly wooded areas, and rocky slopes.A
Tipo de vegetación
Bosque de neblina/mesófilo, Bosque de encino, Bosque de pino-encinoB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The non-aristate to short-aristate median leaves that are short-ciliate at the bases to denticulate at the tips, yellow megaspores, and auriculate axillary leaves with long-ciliate margins distinguish S. delicatissima from S. chiapensis, S. flexuosa, S. guatemalensis, and S. martensii.A