Marsilea mollis B.L.Rob. & Fernald
Descripción
Main rhizomes brown to black with nodal roots, occasionally with an internodal root, internodes 0.8–2.3 cm long, apices densely pilose, glabrate beneath, rhizomes in water green; land fronds 1.1–14 cm long, stipes terete and pilose, leaflets .25–1.7 X 0.13–1.6 mm, densely pilose beneath, sparsely pilose or glabrous above, lateral margin convex to straight; floating leaves 12.5–100 cm long, leaflets 0.5–2.6 X 0.5–2.9 cm; abaxial intercostal striae irregularly distributed; fertile leaves on land, bearing one sporocarp on erect to slightly decumbent peduncle; sporocarps ovate in lateral view, often with conspicuous lateral ribs, gray-brown to brownish black, covered with acicular 4–5-celled verrucose hairs, soon glabrate, 2.4–4 X 2–3 mm, 1.3–1.7 mm thick; raphe 0.6–1.4 mm long, inferior tooth blunt or absent, superior tooth blunt or absent.A
Forma de vida
TerrestreA
Ejemplar revisado
Ags (Rzedowski & McVaugh 882, MICH). BCS (Brandegee s.n., Sep 1893, DS). Chih (Pringle 2007, MEXU, MO, NY, TEX, UC, US). Chis (Murray & Johnson 1404, NY, UC). DF (Schaffner 17, 18, NY). Dgo (Palmer 13, F, LL, K, MEXU, MO, NY, US). Gto (Dziekanowski et al. 1797, MO, NY). Hgo (Moore 3452, UC, US). Jal (Pringle 2434, CAS, F, K, MEXU, MO, NY, UC, US). Méx (García P. 987, CHAPA, F, LL, MO, NY; Koch 74196, CAS, CHAPA, ENCB, MEXU). Mich (Díaz Barriga 2194, IEB). Oax (Pringle s.n., 7 Jun 1894, F). SLP (Rollins & Tryon 58319, GH, US). Son (Hartman 893, GH, MO, UC, US). Ver (Brigada Vegetación Acuática 339, MEXU, XAL).
Unverified, Doubtful, or Mistaken Reports. Mor (Jackson 19, MICH, cited by Pérez-García et al., 1999, but not verified). Nay (Alava & Cook 1529, UC, sterile, identification not certain). Pue (Arsène 520, 2283, US, cited by Pérez-García et al., 1999, but not verified). Qro (Rzedowski 48832, IEB, not seen, cited by Arreguín et al., 2001, but this is M. ancylopoda, according to Pérez-García et al., 1999).A
Unverified, Doubtful, or Mistaken Reports. Mor (Jackson 19, MICH, cited by Pérez-García et al., 1999, but not verified). Nay (Alava & Cook 1529, UC, sterile, identification not certain). Pue (Arsène 520, 2283, US, cited by Pérez-García et al., 1999, but not verified). Qro (Rzedowski 48832, IEB, not seen, cited by Arreguín et al., 2001, but this is M. ancylopoda, according to Pérez-García et al., 1999).A
Elevación
1200 – 2500 mA
Ecología y Hábitat
Clay substrates on sandy soils, in temporary ponds and lakes.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The small sporocarps with spreading hairs, lacking a superior tooth and attached to wiry peduncles characterize this species. Marsilea mollis bears sporocarps March through December (and perhaps all year) in Mexico. See M. ancylopoda for comparison with that species.
The following sterile collections are probably this species, but in the absence of sporocarps, we cannot be certain: Mor (Lyons 63, US; Bonilla 316, HUMO, MEXU, cited by Riba et al., 1996, but not verified). Pue (Arsène 520, 2283, US). Qro (Rzedowski 42619, 43101, IEB).
A
The following sterile collections are probably this species, but in the absence of sporocarps, we cannot be certain: Mor (Lyons 63, US; Bonilla 316, HUMO, MEXU, cited by Riba et al., 1996, but not verified). Pue (Arsène 520, 2283, US). Qro (Rzedowski 42619, 43101, IEB).
A