Nephrolepis biserrata (Sw.) Schott
Descripción
Rhizomes suberect to erect, stout, lacking tubers; rhizome scales concolorous, pale brown to orange, lanceolate, 5–7 mm long; stipes light brown, 20–30 cm long, filiform-scaly to glabrescent; blades firm-herbaceous, linear-elliptic, 75–100(–200) X (11–)16–24 cm; rachises stramineous to tan, with dense, fibrillose scales, 1–2 mm long, adaxial surfaces with catenate hairs; pinnae short-stalked, ± equally cuneate to equally auriculate at bases, (5–)8.5–20 X 0.9–2 cm, apices of longest pinnae acuminate, margins finely serrulate (sterile blades) to crenulate or bicrenulate (fertile blades); indument abaxially, especially on costae, of fine, often rather dense catenate hairs 0.2–0.6 mm long and scattered to dense, tan, fibrillose scales, especially on costae, adaxial surfaces with numerous catenate hairs 0.1–0.3 mm long on costae; hydathodes often lime-dotted on adaxial blade surfaces; indusia brown, round-reniform, 0.8–1 mm diam., with a few hairs 0.1–0.3 mm long, each indusium with a narrow sinus (mature sporangia projecting on all sides); 2n=82 (Jam, PR, Trin, Africa, India).A
Forma de vida
Terrestre, o Epipétrica. EpífitaA
Ejemplar revisado
Camp (Tun G. et al. 67, MEXU). Chis (Martínez S. 9505, MEXU, UAMIZ, XAL, 10496, MEXU, MO, UAMIZ). Nay (González Ortega 73, US). Oax (Hernández G. & González 1692, CAS, MO, NY, UAMIZ). Pue (Ventura 576, ENCB, NY). QR (Torres 47, UAMIZ). Tab (Valdivia 2032, MO, XAL). Ver (Orcutt 6625, DS, NY, UC; Ventura A. 14976, UAMIZ, XAL).
Unverified, Doubtful, or Mistaken Reports. Jal (Martıínez s.n., May 1989, IBUG, cited by Mickel, 1992, but not verified). Yuc (Tun G. 262, UADY, cited by Palacios-Rios, 2002b, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Jal (Martıínez s.n., May 1989, IBUG, cited by Mickel, 1992, but not verified). Yuc (Tun G. 262, UADY, cited by Palacios-Rios, 2002b, but not verified).
A
Distribución
Asia PresenteA, Caribe PresenteA, Centroamérica: Belice PresenteA; Costa Rica PresenteA; El Salvador PresenteA; Guatemala PresenteA; Honduras PresenteA; Nicaragua PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA, Norteamérica al N de México PresenteA, Oceanía PresenteA, Sudamérica PresenteA, África PresenteA
Elevación
100 – 1000 mA
Ecología y Hábitat
Palm plantations (Tabasco).A
Tipo de vegetación
Matorral de otro tipo, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The rotund-reniform indusia with occasional hairs, pinnae with hairs on the costae adaxially and laminar tissue abaxially, and concolorous, spreading rhizome and stipe base scales distinguish this species. See key for comparison with N. hirsutula, seemingly a recent introduction. In Florida and Jamaica N. biserrata hybridizes with N. exaltata to produce an abortive-spored hybrid (N. X averyi), described by Nauman (Amer. Fern J. 69: 69. 1979). The hybrid grows with its two parents, is larger than N. exaltata, and has sparse hairs adaxially.
Paleotropical material under this name in herbaria, when not misidentified (which is often the case), seems to diverge significantly in a number of characters, including pubescence and pinna shape. Most likely, the name, as currently applied, encompasses more than one species, but a better delimitation of species in this presumed complex must await more critical examination of specimens throughout the range.A
Paleotropical material under this name in herbaria, when not misidentified (which is often the case), seems to diverge significantly in a number of characters, including pubescence and pinna shape. Most likely, the name, as currently applied, encompasses more than one species, but a better delimitation of species in this presumed complex must await more critical examination of specimens throughout the range.A