Trichomanes pinnatum Hedw.
Descripción
Rhizomes stout, 3–5 mm diam., suberect; rhizome hairs dark brown, 1.5–2 mm long; roots present; fronds 12–40 cm long, clumped; stipes 1⁄4–1⁄3 the sterile fronds, 1⁄2 the fertile fronds, stout, 1–1.3 mm wide, brown, non-alate, with scattered dark brown hairs 1–1.5 mm long; blades pinnate, 8–15 cm wide, not reduced at bases, each with a conform terminal pinna, ovate to deltate, light green, membranaceous; rachises sometimes extended and proliferous, alate with hairs similar to those of stipes; pinnae 8–15 pairs, basal pair stalked, glabrous, bases truncate, apices acute, margins irregularly denticulate, sinuses between vein ends 0.3–1 mm deep; veins free, simple or 1-forked, rarely netted at base of sori, but with abundant false veins perpendicular to the true veins making them appear netted, false veins forming a submarginal vein; involucres stalked, free from blade tissue, 1 mm long, 0.3 mm wide at bases, 0.5–0.8 mm wide in middle, mouths not flaring, 0.5 mm wide, not bilabiate, concolorous, stalks 0.5 mm long; 2n=ca. 72 (Braz).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Martínez S. 25014, 25342, MEXU). Gro (Langlassè 672, MEXU; Lorea 2885, F, FCME). Oax (Mexia 9133, NY; Mickel 5830, NY). Tab (Edith et al. 12, XAL; Manríquez L. 19, ENCB). Ver (Orcutt 3198, US; Wendt et al. 4803, NY).A
Elevación
200 – 600 mA
Ecología y Hábitat
In wet forests at low elevation in Atlantic lowlands.A
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Trichomanes pinnatum is distinct in its pinnate fronds with false veins perpendicular to the true veins.A