Meniscium arborescens Humb. & Bonpl. ex Willd.
Descripción
Rhizomes short-creeping; fronds to 200 cm long, with stipes longer than blades; blades 1-pinnate, to 70 X 40 cm, gradually reduced in width distally, lacking buds in axils of pinnae; pinnae 12–17 lateral pairs plus a subsimilar terminal pinna, 10–22 X 2.3–4 cm, sessile, rounded or truncate at bases, margins entire or slightly repand, acuminate at apices; lateral veins producing arcuate or subsigmoid secondary veins, these acutely anastomosing and forming a series of 9–15(–20) areoles between costae and margins, excurrent veinlets free, the areoles much shorter than broad; indument abaxially of curved to straight acicular hairs 0.2–0.3 mm long on costae, costules, veins, and sometimes tissue between veins, adaxially the blades glabrous except for scattered hairs along costae; sori oblong and confluent where secondary veins anastomose; sporangia bearing acicular solitary hairs from the sporangial stalks.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis: Cerro de Tonala, 1 February 1896, Seler 2013 (GH, B); Oax: Santa Maria Chimalapa, rio Milagro, ca 2 km al SE de Sta María, 94°40’30” W, 16°54’00” S, 200m, 30 August 1984, Hernández 385 (NY, MO)
(Related to the synonym Thelypteris standleyi) Chis (Seler & Seler 2013, GH, US). Jal (Rzedowski & McVaugh 1357, ENCB).
A,B
(Related to the synonym Thelypteris standleyi) Chis (Seler & Seler 2013, GH, US). Jal (Rzedowski & McVaugh 1357, ENCB).
A,B
Elevación
400 – 1200 mA
Ecología y Hábitat
In wet forested ravines.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
(In relation to synonym) Thelypteris standleyi differs from all other species of Meniscium in Mexico by the sporangia bearing setae from the sporangial stalks. From T. falcata and T. angustifolia it differs by the rounded or truncate (vs. cuneate) pinna bases.A