Tent. Pterid. 190, plate 7, figs. 18–20. 1836.
Stems short-creeping, 4–10 mm diam. Leaves few-to-many, erect to arching. Petiole essentially absent to ca. 9 cm. Blade yellowish green, linear to linear-elliptic, 24–140 × 3–12 cm, leathery; base attenuate; margins entire to slightly undulate; apex acute (sometimes forked). Veins obvious, primary-veins ± prominent, straight to slightly curved, areoles in 7–16 (–18) series between costa and margin, with free included veinlets, a percurrent veinlet often dividing some areoles further. Sori in several rows on each side of costa. 2n = 148.
Habitat: Epiphytic in hammocks and swamps, sometimes on walls in limestone sinkholes where it is reduced in size, substrate circumneutral to subacid
Elevation: 0 m
Fla., Mexico, West Indies, Central America, South America