Rhizome creeping, 5-8 mm thick, often supported above the substrate by unbranched stilt-like roots, dorsiventrally flattened, (strongly compressed, 4-6 mm wide when dry), with up to 10 cm long, curved internodes (only occasionally straight and then often much longer) terminating in a cluster of a few fronds, with an innovation just below this cluster, lateral branches usually basal on the internodes, in opposite pairs; all parts in cross-section without or with few sclerified strands, white waxy in the older parts; roots scattered, with long unbranched aerial parts. Scales persistently covering the rhizome, peltate, 5-10 by 1-1.5 mm, appressed, with dark centre and lighter brown acumen and margin, margin ciliate especially when young and with sessile glands. Fronds monomorphic, phyllopodia short, usually less than 5(-15) mm high, often hidden by the scales, stipe 0.5-4 cm long, without dark coloration, with short, glandular hairs; lamina to 60 by 4.2 cm, linear, base cuneate to truncate or more or less rounded, apex acute to long-acuminate, texture thin-chartaceous, both surfaces with catenate, often glandular hairs 0.2-0.5 mm long; costa without dark coloration, on lower surface with inconspicuous, 1-3 mm long brown scales. Sori mostly in a single regular row close to the costa, sometimes more scattered over a 2-5 mm wide zone close to the costa or at a distance of up to 3 mm, indusium distinct, 1.5-2 mm wide, glabrous or glandular, sometimes setose. Sporangial stalk with glands below the sporangium. Spores with coarse confluent ridges, areolae with short pointed excrescences, perispore hollow, with internal baculae, outer layer not or hardly perforated.
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Plants terrestrial or epilithic; rhizome stiff, long creeping, growth sympodial, continuing mostly from lateral branches below each tuft of fronds, 4-5 mm in diam., white waxy under scales; roots long, stiff, restricted to ventral side, usually with unbranched glabrous part (rhizophore); scales strongly appressed, dark brown at middle, pale brown at apex and margin, narrowly ovate-lanceolate, 3-5 × 0.5-1.5 mm, base rounded or subacute, margin ciliate, apex long acuminate. Fronds erect, mostly in tufts of 2-4; phyllopodia very short, 1-2 mm, sometimes up to 5 mm, immersed in scales; stipe stramineous, 1-2.5 cm; lamina green or brown when dry, linear-lanceolate, 12-43 × 1.8-3.5 cm, herbaceous, abaxially sparsely hairy, adaxially pubescent or glabrous, base cuneate to rounded, margin slightly wavy, not undulate, and glabrous, apex long acuminate or caudate; costa raised on both sides, sparsely scaly abaxially, slightly grooved adaxially; veins simple or forked at base, rarely forked medially. Sori 2-4 mm from costa; indusia brown, margin pale brown, orbicular-reniform, glabrous.
Mostly terrestrial or on rocks, less often as low trunk epiphyte, in various types of forest, often disturbed, up to c. 2000 m altitude.
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