Ceratopteris pteridoides (Hook.) Hieron.

Primary tabs

Ceratopteris pteridoides (Hook.) Hieron.

Descripción

Plants floating, occasionally rooted in mud; stipes 4–17 mm wide, often inflated or enlarged distally; sterile fronds ca. 8–30 X 5–25 cm; sterile blades mostly simple and palmately 3-lobed or pinnatifid and 5-lobed (occasionally pinnate-pinnatifid at the base), the proximal pinnae (or lobes) opposite or nearly so; buds often present in blade sinuses of actively growing fronds; fertile fronds ca. 15–50 X 8–35 cm, pinnae 4–9 pairs, ascending, proximal pairs often opposite or subopposite; sporangia with annuli absent or vestigial, the indurate cells 0–12(–40); spores 32 per sporangium; 2n=78 (Salv).A

Forma de crecimiento

Hierba

Forma de vida

Hidrófita enraizada, Hidrófita libreA

Nutrición

Autotrófica

Ejemplar revisado

Chis (Breedlove 56074, CAS, ENCB, LL, MEXU, NY). Gro (Lozada P. 926, FCME; Velázquez 740, ENCB). Nay (Téllez 10363, MEXU). Tab (Cowan 2804, CAS, CHAPA, ENCB, MEXU, NY, 2882, CHAPA, ENCB, NY; Haynes 5500, NY; Zamudio 1057, MEXU). Ver (Lot 1625, ENCB, IEB, MEXU; Palacios-Rios 3232, XAL).A

Distribución

Caribe PresenteA, Centroamérica: Costa Rica PresenteA; El Salvador PresenteA; Guatemala PresenteA; Honduras PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA, Norteamérica al N de México PresenteA, Sudamérica PresenteA

Elevación

0 – 50 mA

Ecología y Hábitat

Floating in marshes, ponds, or in slow-moving rivers or streams.A

Tipo de vegetación

ManglarB

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

Lloyd (1974) recognized four species in the genus, three of which were cited from both Guatemala and the United States. Although he cited only one specimen of Ceratopteris from Mexico (Liebmann s.n., US!) and this was identified as a hybrid between C. pteridoides and C. richardii Brongn., we refer all but one recent Mexican collection to C. pteridoides.
Ceratopteris pteridoides has 32 spores per sporangium, stipe width 4–17 mm, sterile blades often simple (palmately or pinnately lobed), sometimes pinnate, and proximal pinnae or segments of sterile blades opposite. Ceratopteris richardii Brongn. (Dict. Class. Hist. Nat. 3: 351. 1823) reputedly has 16 spores per sporangium, stipe width 0.8–6.5(–12) mm, sterile blades pinnate to bipinnate, and proximal pinnae of sterile blades inserted mostly alternately. Tryon and Tryon (1982) treated C. richardii as a synonym of C. thalictroides. Hickok and Klekowski (1974) and Hickok (1977) found that synthesized hybrids between C. pteridoides and C. richardii, both diploids, resulted in 40% viable spores, suggesting that those two species are not completely reproductively isolated. The affinities of C. richardii are still uncertain; Lloyd (1974) thought it intermediate morphologically between C. thalictroides and C. cornuta (P. Beauv.) Lepr., an African species. Should C. richardii prove to be synonymous with C. pteridoides, then the former name has priority.
A

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88
B. Velázquez Montes, E. 2018: Pteridaceae (Pteridophyta). Jiménez Ramírez, J., Fonseca Juárez, R. M. & Martínez Gordillo, M. Fl. Guerrero 82: 1-226
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]