Selaginella harrisii Underw. & Hieron.
Descripción
Stems erect, green, 4–30 cm tall, ca. 1 mm diam., not articulate, not flagelliform, not stoloniferous, 3(–4) times branched; rhizophores only at base, 0.2–0.5 mm diam.; leaves uniform on main stems below first branches, anisophyllous otherwise, appressed on main stems below first branch, ovate, bases rounded to subauriculate, margins long-ciliate, bases often with branched hairs, apices acuminate; lateral leaves ovate, bases rounded, margins narrowly white-bordered, long-ciliate acroscopically, shortciliate to denticulate distally, old leaves green, apices sharply acute; median leaves ovate, bases with single short auricle, margins short-ciliate with narrow white borders, apices aristate; axillary leaves lanceolate, bases rounded, long-ciliate proximally, short-ciliate to denticulate distally; strobili quadrangular, 5–13 mm long; sporophylls monomorphic; megasporangia basal or subbasal in ventral rows; microsporangia in dorsal rows and distally in ventral rows; megaspores lemon-yellow to cream, 300–360 µm diam.; microspores bright orange.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Gilly & Hernández X. 397, MSC; Riba et al. 1393, ENCB). Hgo (Chase 7433, ARIZ). Oax (Hallberg 1375, NY; Mickel 6153, NY). Qro (Fernández 3440, ENCB, NY, TEX). SLP (Hellwig & Whitaker 1220, MEXU; Pennell 17948, PH). Tab (Gilly & Hernández 397, MSC). Ver (Copeland herb. 171, MEXU). Yuc (Montgomery 87-04, NY).
Unverified, Doubtful, or Mistaken Reports. Camp (Palacios-Rios et al. 3609, XAL, cited by Palacios-Rios, 2002a., but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Camp (Palacios-Rios et al. 3609, XAL, cited by Palacios-Rios, 2002a., but not verified).
A
Elevación
600 – 1550 mA
Ecología y Hábitat
On dry soil in shady ravines, steep slopes, limestone ridges.A
Tipo de vegetación
Bosque de pino-encino, Bosque de neblina/mesófilo, Selva medianaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Selaginella harrisii differs from S. pallescens in having long stems that are not branched at the bases and have clasping leaves on most of the main stems. The only specimens of S. pallescens with those conditions occur in western Mexico (Jalisco and Nayarit) whereas S. harrisii is limited to eastern Mexico. Furthermore, S. harrisii has green older leaves (vs. tan), long ciliate stem leaves with slightly auriculate bases (vs. rounded), lateral leaves short-ciliate or denticulate with narrow white borders on acroscopic margins, entire to denticulate on basiscopic margins, and median leaves with white margins narrow to absent. It is related to S. polyptera and S. pulcherrima, which can be separated by characters given in the key. Another possible relative is S. microdendron Baker, known only from Cuba, which is a smaller frondose plant with biauriculate stem and axillary leaves with longciliate bases and short-ciliate margins.A