Pityrogramma trifoliata (L.) R.M.Tryon
Descripción
Rhizomes erect; rhizome scales bicolorous, centers dark reddish brown, thickened, margins narrow, light brown, 3–4 X 0.5–0.8 mm; fronds 0.5–2.4 m long, clumped; stipes 1⁄5–1⁄3 the frond length, with scales at base numerous, castaneous, concolorous, light brown, to 5 X 1–1.5 mm, and scattered hairs 1 mm long; blades pinnate at tip to usually bipinnate at bases, to 15 cm wide, pinnae usually divided toward the frond base into (2–)3 pinnules oriented out of the plane of the frond, the segments linearoblong, irregularly serrulate, thin with prominent veins, glabrous adaxially, glabrous to white-farinose abaxially, non-articulate, sterile ones to 90 X 8–12 mm, fertile ones to 90 X 3–5 mm, margins recurved, unmodified; sori irregularly elongate along the veins from midribs to margins; spores reddish brown; 2n=120 (Jam).A
Forma de vida
TerrestreA
Ejemplar revisado
BCS (Brandegee 655, NY, UC). Chis (Breedlove 14908, DS, ENCB, NY, US). Gro (Tenorio L. et al. 479, MEXU). Hgo (Lautner L01/44, UC). Méx (Hinton 8464, NY, US). Mich (Torres 13646, IEB, XAL). Oax (Camp 2459, ENCB, NY, UC; Mickel 6662, NY). Pue (Lyonnet 510900009, MEXU). Ver (Ventura A. 4352, ENCB, MEXU, NY, XAL).
A
A
Elevación
100 – 1500 mA
Ecología y Hábitat
Wet open banks or meadows or seepage areas.A
Tipo de vegetación
Selva baja, Bosque de pino-encinoA
Tipo de vegetación (notas)
Coffee plantations.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Pityrogramma trifoliata is often placed in a separate genus Trismeria. It crosses with P. calomelanos in Costa Rica, Panama, and Argentina.A