Diplazium obscurum Christ
Descripción
Rhizomes erect or suberect, caudices 2–3 cm diam., with thick prop-like roots 2–3 mm diam.; fronds mostly 1–1.6 m long; stipes dark purplish brown, 30–45 cm X 4–7 mm, 1⁄3–1⁄2 the blade length, toward bases persistently scaly, scales brownish, to ca. 10 X 2 mm; blades subcoriaceous, pinnate with a ± conform terminal pinna that is like the lateral ones, but sometimes a little broader at the base and with 1 or 2 basal lobes and then shallowly crenate for a few cm, 45–110 X 25–50 cm, each blade with a bud in the axil of a distal pinna; rachises purplish, nearly glabrous except for minute hairs < 0.1 mm in adaxial grooves; pinnae stalked to 6 mm, equilateral, mostly 9–12 pairs per blade, 13–23 X 3–4.5 cm, oblong-elliptic, bases rounded to broadly cuneate, apices acuminate, commonly entire, but crenulate or serrulate near apices; veins free, forking 3–4 times, all veins strongly abruptly curved and running toward pinna margins, ultimately ± parallel; indument adaxially of sparse minute hairs in costal grooves, abaxially with brownish fibrils or narrowly lanceolate scales 1–3 mm long and sparse minute hairs <0.1 mm long on costae; sori confined mostly to proximal half of first acroscopic branch of each vein group, mostly back-to-back, with brownish, entire indusia ca. 5–13 X 0.7 mm.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 29817, DS, NY, 49319, CAS; Croat & Hannon 65231, MO, US). Gro (Lorea 3002, FCME, IEB). Oax (Ingela 95-M039, NY). Pue (Campos V. 397, IEB). Ver (Ventura A. 11616, ENCB, IEB, MEXU, XAL).
A
A
Elevación
800 – 2000 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Diplazium obscurum differs from congeners in Mexico by the combination of entire pinnae (except at tips), ± conform terminal pinna, and a bud at the base of a distal pinna.A