Ceratopteris thalictroides (L.) Brongn.
Descripción
Plants generally on mud, sometimes in shallow water; stipes 0.7–8 mm wide, about the same width throughout their length; sterile fronds ca. 6–60 X 5–20 cm; sterile blades (1–)2–3-pinnate, the proximal pinnae alternate; buds absent or usually dormant on actively growing blades, generally developed only on senescent blades; fertile fronds usually ca. 15–60 X 10–35 cm, pinnae 4–6 pairs, ascending, proximal pairs subopposite; sporangia with annuli of 15–70 clearly indurate cells; spores 32 per sporangium; 2n=156 (Hawaii, Japan).A
Forma de vida
Hidrófita enraizadaA
Ejemplar revisado
Gro (Fonseca 1643, FCME).
Unverified, Doubtful, or Mistaken Reports. Oax (Pérez-García 1033, MEXU, cited by Tejero-Díez & Mickel, 2004, but not verified). Tab (reported by Magaña, 1992, probably based on a misidentification of C. pteridoides).A
Unverified, Doubtful, or Mistaken Reports. Oax (Pérez-García 1033, MEXU, cited by Tejero-Díez & Mickel, 2004, but not verified). Tab (reported by Magaña, 1992, probably based on a misidentification of C. pteridoides).A
Elevación
10 mA
Ecología y Hábitat
In slow-moving rivers or streams.A
Tipo de vegetación (notas)
Tular, palmar.B
Categoría IUCN
Preocupación menor (LC)C
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Citation of this species from Guerrero by Lorea-Hernández & Velázquez M. (1998) was based on a specimen they identified as C. pteridoides; they did not cite the Fonseca collection cited above, which was collected in 1989. Lellinger (1989) and Moran (in Davidse et al., 1995) cited Mexico (Tabasco) in the range of C. thalictroides, but no specimens have been seen from there; the citation by Moran was based on Cowan (1983), but these specimens are all C. pteridoides. Another possible record of C. thalictroides from Mexico is a specimen from Tamaulipas, “presa Vicente Guerrero, en El Campo recreativo Morris, 2 km de V. casas, Mpio., Villa de Casas,” 250 m, Martínez 929 (MO), but the specimen is poor, sterile, and of uncertain identity.
Stolze’s (1981: 125) illustration of “C. thalictroides” is similar to the Chiapas collection identified here as C. pteridoides, and it seems possible the specimen on which the illustration was based is misidentified. Sterile fronds of C. thalictroides are generally more finely divided with much narrower segments than those of C. pteridoides, and the stipes are not inflated.
D
Stolze’s (1981: 125) illustration of “C. thalictroides” is similar to the Chiapas collection identified here as C. pteridoides, and it seems possible the specimen on which the illustration was based is misidentified. Sterile fronds of C. thalictroides are generally more finely divided with much narrower segments than those of C. pteridoides, and the stipes are not inflated.
D