Diplazium plantaginifolium (L.) Urb.
Descripción
Rhizomes ascending to erect; rhizome scales concolorous black, lustrous, deltate, 0.8–1 X 0.5–0.8 mm; fronds (20–)30–60(–70) cm; stipes green, (10–)20–35 cm X 1–2.5 mm, 1⁄3–2⁄3 the frond length, bases with sparse black scales 2–3 mm long, otherwise glabrous; blades simple (lacking pinnae), 15–22(–30) X 3.5–6(–8) cm, lanceolate to narrowly elliptic, bases truncate to broadly cuneate, apices abruptly narrowed to attenuate tips, margins crenulate or bicrenulate, occasionally serrulate toward apices, occasionally with a bud at blade bases; veins free, 3–5-forked, branches abruptly curving toward margins and running nearly parallel to each other; indument absent on all parts of the blades, or midribs abaxially with scattered brownish hair-like fibrils to 1 mm long; sori mostly single on veins, often along only acroscopic vein branch, occasionally diplazioid, appearing ± parallel, with entire indusia 4–30 X 0.3–0.5 mm.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 67033, 70863, CAS; Dressler 1620, MEXU, NY, US). Oax (Hernández G. 1006, 1645, 1626, 2553, CHAPA, NY). Pue (Pacheco 3226, UAMIZ). Ver (Purpus 1970, 1970a, UC; Ventura 8213, ARIZ, CAS, IEB, MO, NY).A
Elevación
150 – 1600 mA
Tipo de vegetación
Bosque de neblina/mesófilo, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Diplazium plantaginifolium is the only Mexican Diplazium with simple, undivided blades. It hybridizes with D. ternatum, forming plants with ternate blades, entire to slightly undulate margins, anterior vein branch forming areoles, and malformed spores: Hallberg 1615, NY, US, from Oaxaca, 150–250 m. This hybrid occurs at a relatively low elevation for D. ternatum. Another putative hybrid between the same two parents is Ventura A. 20222 (ENCB), from Puebla. This specimen has the terminal pinna 3–4 times longer than the two lateral pinnae and malformed spores. Other hybrids involving D. plantaginifolium have been seen from Hispaniola (Mickel 8990, NY, UC).A