Ctenitis thelypteroides A.R. Sm.
Descripción
Rhizomes short-creeping to obliquely erect, to 4 mm diam., mostly obscured by stipe bases; fronds to ca. 60 cm long; stipes tan, ca. 1⁄2 the frond length, to 28 cm X 2 mm, bases with castaneous, spreading, lanceolate scales to 5 X 1 mm; blades green, pinnate-pinnatifid, ovate, to ca. 30 X 16 cm; rachises abaxially with scales similar to those of stipe bases but smaller; pinnae to 15 pairs, proximal ones stalked to 2 mm, to 9 X 2 cm, deeply incised to within 1 mm of costae, proximal pinnae somewhat narrowed at their bases; segments entire or minutely toothed, tips acute to obtuse, margins eciliate; veins simple, to 8 pairs per segment, reaching the margins above the sinuses; indument on costae abaxially of castaneous, linear-lanceolate, flattened, entire scales to 1.5 mm, also bearing minute glands ca. 0.1 mm; laminae between veins abaxially glabrous or with inconspicuous, scattered, yellow, appressed, tubular glands, glabrous adaxially; sori medial, mostly confined to tips of segments, with tan, persistent glabrous indusia ca. 0.3 mm diam.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Sohns 1696, US).A
Elevación
200 mA
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This differs from C. nigrovenia, its closest relative, by the smaller, indusiate sori localized at the tips of the segments and the proximally narrowed pinnae. Stolze (1981: 155) and Moran (in Davidse et al., 1995: 199) reduced C. thelypteroides to synonymy under C. nigrovenia, but the two species seem adequately distinct to us.A