Marsilea deflexa A.Br.

Contenido

Descripción

Main rhizomes with nodal and internodal roots, internodes 1.5–6.5 cm long, apices with dense, tan hairs, glabrate beneath, rhizomes in aquatic habitats green; land fronds 2–9.3 cm long, stipes terete and glabrate, leaflets 1.1–2 X 0.9–1.7 cm, glabrous to sparsely hairy, lateral margin concave to convex, terminal margin entire; floating leaves 4–18 cm long, stipes terete and glabrous, leaflets 1.4–3.1 X 1.6–2.9 cm, lateral margin straight to convex; abaxial intercostal striae almost always present and uniformly distributed, except for small patch just distal to the pulvinus; fertile leaves in water and on land, bearing 1–4 sporocarps on lower 1⁄4 of stipes; sporocarps rectangular, quadrate in lateral view, with conspicuous lateral ribs, covered with flattened matted hairs, eventually glabrate, brown to purplish black, 3.5–6 X 2–4.5 mm, 1.7–2.8 mm thick, raphe and teeth absent.A

Forma de crecimiento

Hierba

Forma de vida

Hidrófita enraizada, Hidrófita libreA

Nutrición

Autotrófica

Ejemplar revisado

Jal (Rzedowski &McVaugh 1331, ENCB). Nay (McVaugh 19287, CAS, IEB, MICH, MO). Oax (Lachica & Sánchez FaI-2118, CAS, ENCB, MEXU). Pue (Bravo-Hollis 523, MEXU). Ver (Ortega O. 583, NY, UC, XAL).
Unverified, Doubtful, or Mistaken Reports. Yuc (Tun G. 544, UADY, cited by Palacios-Rios, 2002b, but not verified).
A

Distribución

Centroamérica: Costa Rica PresenteA; Guatemala PresenteA; Honduras PresenteA, México (país) Nativo y no endémicoA, Sudamérica PresenteA

Elevación

0 – 1100 mA

Ecología y Hábitat

Aquatic on clay substrates or floating in seasonal ponds, marshes and ditches.A

Tipo de vegetación

Acuática y subacuática.B

Categoría IUCN

No incluidaC

Categoría NOM-059-SEMARNAT-2010

No incluidaD

Estatus del taxón

(A) Como definida actualmente, probablemente una entidad natural (monofilética)

Discusión taxonómica

Marsilea deflexa produces sporocarps throughout the year. It does not persist as sporophytes with viable rhizomes through the dry seasons, but new plants are produced each wet season by dehiscence of sporocarps. Hybrids are known between this species and M. polycarpa in (Johnson, 1986). See M. polycarpa for comparison.A

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88

B. Velázquez Montes, E. 2014: Ophioglossaceae (pteridophyta). En: Diego-Pérez, N. & Fonseca R. M. (Eds.). Fl. Guerrero 62: 1-21

C. IUCN 2022: The IUCN Red List of Threatened Species. Versión 2022-2

D. SEMARNAT 2019: MODIFICACIÓN del Anexo Normativo III, Lista de especies en riesgo de la Norma Oficial Mexicana NOM-059-SEMARNAT-2010: 101 pp. – https://www.dof.gob.mx/nota_detalle.php?codigo=5578808&fecha=14/11/2019#gsc.tab=0 [accessed 2023-05-04 06:16]