Pteris cretica L.
Descripción
Rhizomes small, ca. 0.5 cm diam., short-creeping; rhizome scales 2–3 X 0.5 mm, concolorous, dark brown, margins with long, scattered hairs; fronds 15–100 cm long, fertile longer tan the sterile, clumped; stipes glabrous, 1⁄2–3⁄4 the frond length; blades deltate or ovate, pinnate to pedate with one pair of exaggerated basal basiscopic pinnules, terminal pinnae conform; pinnae linear, 80–150 X 7–12 mm, proximal ones sessile or shortpetiolate, distal ones long-decurrent on rachises, pinna bases cuneate, chartaceous to coriaceous, sterile pinna margins serrulate, with attenuate teeth, rarely crenulate, adaxial surfaces glabrous, abaxial surfaces glabrous with occasional brown hairs 1 mm long on midribs; awns absent; veins free; indusia 0.5 mm wide, entire; sporangia mixed with colorless, paraphyses 0.3 mm long; spores orange-tan; 2n=58, 87, 116, 174, 232 (all Old World), n=2n=58 (Taiwan, India, Italy, Japan, Nepal), 116 (Zimbabwe, Ascension Island).A
Forma de vida
TerrestreB
Ejemplar revisado
Chih (Bye 7510, MEXU). Chis (Breedlove 51936, CAS, ENCB). DF (Lyonnet 1485, MEXU, US). Dgo (Sánchez 745, MEXU). Gro (Hinton 14206, ENCB, US). Gto (Ventura & López 9184, ENCB, IEB, MEXU). Hgo (Sánchez-Mejorada 168, MEXU, US). Jal (McVaugh 26166, MEXU, MICH). Méx (Matuda 27441, MEXU, UC, US). Mich (Arsène 2427, MEXU). Mor Lyonnet 2878, FCME, UC, US). NL (Pringle 1985, MEXU, UC, US). Oax (Rzedowski 21027, MEXU, MICH, NY). Pue (Orcutt 4028, MEXU, US). Qro (Rzedowski 42554, IEB, MEXU, XAL). Sin (Lehto 24378, ARIZ, ENCB). SLP (Rzedowski 10571, ENCB, MEXU). Son (Turner & Martin 79-379, MEXU). Tam (Diggs & Nee 2409, XAL). Ver (Palacios-Rios & Hernández M. 535 UAMIZ).A
Elevación
(700 –)1400 – 2800 mA
Tipo de vegetación
Bosque de neblina/mesófilo, Selva alta, Bosque de otro tipoA
Tipo de vegetación (notas)
Moist, lightly wooded banks in mesic forests, edge of streams.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Tryon (1964) and Smith (1981) considered this species to be native to the Old World and perhaps to Mexico, but introduced elsewhere. Pteris cretica is distinct in its 1-pinnate blades, free veins, and exaggerated basiscopic pinnules.A