Acrostichum lanceolatum (Fée) Hooker (1864), not Linnaeus (1753), nor Roxburgh (1816); A. listeri Baker; A. variabile Hooker; A. variabile var. laciniatum Hooker; Anapausia decurrens (Blume) C. Presl; Campium decurrens (Blume) Copeland; C. laciniatum Copeland; C. lanceolatum (Fée) Copeland; Colysis decurrens (Blume) Panigrahi; C. evrardii Tardieu; C. poilanei C. Christensen & Tardieu; Dendroglossa zeylanica (Fée) Copeland; Gymnopteris dichotomophlebia Hayata; G. feei T. Moore; G. feei f. anomala Beddome; G. feei var. pinnatifida Beddome; G. feei var. trilobata Beddome; G. wallichiana C. Presl; Leptochilus hilocarpus Fée; L. laciniatus (Hooker) Ching; L. laciniatus var. simplex Ching; L. lanceolatus Fée; L. listeri (Baker) C. Christensen; L. thwaitesianus Fée; L. zeylanicus Fée; Paraleptochilus decurrens (Blume) Copeland; P. decurrens var. lanceolata (Fée) R. D. Dixit.

Rhizome 2.5-3 mm in diam., dorsiventrally flattened, with only scattered strands of sclerenchyma (rarely also in ca. 6 bundle sheaths); sclerenchyma strands 20-100; roots densely set; scales pseudopeltate (sometimes peltate), densely set, slightly spreading, narrowly ovate or triangular, broadest below middle, 2-5 × 0.3-1 mm, margin denticulate; central region bearing multiseptate hairs at least when young, or central region glabrous; phyllopodia 1-7 mm apart, ± distinct. Sterile fronds: stipe 0-18 cm, base with 2 longitudinal ridges; lamina narrowly ovate to ovate (to narrowly obovate), 10-50 × 2.5-11 cm, abaxial surface with short glandular hairs, base decurrent almost to base of stipe, 1.2-1.7 mm in diam. Fertile fronds: stipe present, 14-50 cm; lamina linear to narrowly ovate to ovate, 0.1-1 cm wide; lateral veins 5-12 mm apart, prominent and distinct, ± straight or zigzag, dichotomously branched near margin, or below middle; no prominent veinlet situated parallel to veins, or each costal areole giving rise to 2 lateral veins, thus lateral veins seemingly branching at or near costa, costal areole bordered by several smaller areoles, no prominent connecting basiscopic vein branching off near costa; connecting veins anadromous, 3-8 between adjacent secondary veins; smaller veins ± sunken and indistinct. Sori acrostichoid, on whole surface of lamina; paraphyses present.

Nooteboom (Blumea 42: 282. 1997) suggested that Leptochilus trifidus Alderwerelt is a hybrid between L. decurrens and Colysis macrophyllus (Blume) C. Presl. The combination "Bolbitis laciniata" (Abeywickrama, Ceylon J. Sci., Sect. A, Bot. 13: 22. 1956) was not validly published because a full and direct reference to the author and place of valid publication of the basionym was not provided (Melbourne Code, Art. 41.5).

Epilithic or epiphytic on trunk bases, sometimes terrestrial, often on rocks beside streams in forests; 100-1800 m. Guangxi, Guizhou, Hainan, Taiwan, Yunnan [Bhutan, India, Indonesia, Malaysia, Malesia, Myanmar, Nepal, New Guinea, Philippines, Sri Lanka, Thailand, Vietnam; Pacific islands (Christmas Island)].