Cystopteris membranifolia Mickel
Descripción
Rhizomes long-creeping, the tips extending beyond the stipes, sparsely clothed with dark brown, fleshy, ovate scales 2.5–3.5 X 0.3–0.8 mm; fronds 14–28 cm long, distant; stipes 4–9 cm long, ca. 1⁄3 the frond length, green to stramineous; blades pinnatepinnatifid, lanceolate or ovate-lanceolate, apices pinnatifid, membranaceous, 1–2 cells thick, glabrous; pinnae 2–3 X 1–2 cm, deltate-lanceolate, sessile; pinnules broadly oblong or elliptic, incised, apices obtuse, margins dentate; segments oblong; veins ending in teeth; sori round, indusia very small, deciduous.
A
A
Forma de vida
TerrestreA
Ejemplar revisado
Oax (Fraser-Jenkins s.n., 14 May 1987, UAMIZ; Mickel 6656, NY). Ver (Rhoads s.n., Mar 1899, US).A
Elevación
1300 – 2500 mA
Ecología y Hábitat
By waterfalls on Atlantic slope.A
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cystopteris membranifolia is a rare species of limited distribution, a “filmy” fern found only in very humid habitats. It is very distinctive, although there are indications of a hybrid origin in the irregular and often malformed spores. Rhizome scales are fleshy when fresh.A