Campyloneurum costatum (Kunze) C.Presl

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Polypodiaceae

  • Scientific Name

    Campyloneurum costatum (Kunze) C.Presl

  • Description

    Species Description - 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).

  • Discussion

    Polypodium costatum Kunze, Linnaea 9: 38. 1834. Type. Cuba. Limonar, Poeppig s.n. (LZ destroyed; isotypes B, BM!, C, K!, L-photos C!, P!).

    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 (Leo´n, 1992, and in Davidse et al., 1995).

  • Distribution

    Epiphytic or on limestone rocks in lowland and lower montane rain forests; 300–750 m. USA (s Fla); Mexico; Guat, Bel, Hond, Nic, CR, Pan; Gr Ant; Col, Ven, Trin, Guy, Sur, Fr Gui, Ec, Braz.

    Brazil South America| Ecuador South America| French Guiana South America| Suriname South America| Guyana South America| Trinidad and Tobago South America| Venezuela South America| Panama Central America| Costa Rica South America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America| México Mexico North America| Florida United States of America North America|