Selaginella underwoodii Hieron., H.G.A.Engler & K.A.E.Prantl
Descripción
Stems usually long-creeping, sometimes short-creeping or pendent, forming loose festoon-like mats or rarely compact mats, radially symmetrical, dry stems not fragile, branching anisotomously, lateral branches well spaced, spreading, not ascending, 1–2 times forked; rhizophores borne throughout stem length, 0.2–0.3 mm diam.; leaves of one kind (isophyllous) throughout stem length, loosely appressed, linear to linear-lanceolate, 2–3.4 X 0.4–0.7 mm, bases mostly decurrent and cuneate, rarely adnate and rounded (on young branches), pubescent or glabrous, apices carinate, slightly attenuate, short- to long-aristate, aristae hyaline-greenish to greenish yellow or rarely white, 0.2–1 mm, sometimes breaking off, margins entire to denticulate or very short-ciliate, cilia hyaline, scattered; strobili sometimes paired, quadrangular, 0.5–3.5 cm long; sporophylls monomorphic; megasporangia basal, strobili mostly microsporangiate; megaspores yellow, reticulate, 350–475 µm diam.; microspores orange, 35–45 µm diam.A
Forma de vida
Epipétrica.A
Ejemplar revisado
Chih (Correll & Gentry 23163, UC; Correll & Johnston 21778, NY). Dgo (González & Acevedo 2143, MEXU). Tam (Nesom 6016, TEX).
Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 4354, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 4354, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).
A
Elevación
1400 – 3200 mA
Ecología y Hábitat
On moist or shaded cliffs, rocky slopes, rock crevices, granitic outcrops, hanging over granite cliffs, sandstone ledges or limestone.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Selaginella underwoodii is a rather distinct species; however, it shows some variation in the number and length of the marginal cilia (from none to many), leaf base pubescence, and arista length.A