Epiphytic herb, rarely terrestrial, evergreen. Rhizome shortly horizontal to creeping, 10–40 mm long, fleshy. Leaves 1–6, pendulous, simple or bifurcate; stipe 3–25 mm long, tapering gradually into the lamina; lamina linear, 0.2–2(–4) m long, 6–90 mm wide, apex acute to obtuse, sometimes furcate, base narrowly attenuate. Fertile spike 25–500 mm long, situated medially well above the base of the lamina, usually about 1/3–1/2-way up the leaf from the rhizome, pedicel 6–25 mm long, sporangial spike 15–450 mm long with 25–50 pairs of sporangia. Spores trilete (not examined). Chromosome number: n = ± 480. Fig. 3/1 (p. 9).