Campyloneurum costatum C.Presl
Descripción
Rhizomes short-creeping, not pruinose, 3–6 mm diam.; rhizome scales dense, brown, lustrous, narrowly lanceolate, 3–5 X 0.8–1(–1.5) mm, clathrate, the cells elongate, at least twice as long as wide; fronds 20–60 cm long, crowded to somewhat distant; stipes 1⁄10–1⁄5 the length of the blades; blades chartaceous to subcoriaceous, oblanceolate or obovate-lanceolate, 3–6 cm wide, bases attenuate or narrowly cuneate, apices generally caudate; lime dots absent adaxially; areoles 5–10 rows between midribs and margins, excurrent veinlets 3 or 4 per primary areole, the middle one completely bisecting the areole; main lateral veins inconspicuous or faintly visible on both sides, secondary veins regularly anastomosing; sori 5–10-seriate between the midribs and blade margins, in two very regular rows between main lateral veins, 2 sori per primary areole; 2n=74 (CR, Jam).
A
A
Forma de vida
or on limestone rocks. EpífitaA
Ejemplar revisado
Chis (Breedlove 33188, 33190, DS, MEXU; Palacios-Rios 2802, UC; Reyes-García & Sousa S. 2257, MEXU). Oax (Mickel 1449, US). Ver (Vera-Santos 3010, US).A
Elevación
300 – 750 mA
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species has features of both C. xalapense and C. serpentinum, and differs from the former in having shorter petioles, oblanceolate blades, and growing at generally lower elevations. It is a much less common species than is C. xalapense. From C. serpentinum (and C. repens) it differs in its shorter-creeping rhizomes and much less obvious secondary venation, and thinner blade texture.
Campyloneurum aphanophlebium (Kunze) T. Moore, which bears short hairs on the petioles and abaxially at the bases of the blades, apparently does not occur in Mexico, although it is known from Belize, Honduras, and further south (León, 1992, and in Davidse et al., 1995).
A
Campyloneurum aphanophlebium (Kunze) T. Moore, which bears short hairs on the petioles and abaxially at the bases of the blades, apparently does not occur in Mexico, although it is known from Belize, Honduras, and further south (León, 1992, and in Davidse et al., 1995).
A