The World Flora Online

Rhizome 0.5-5 mm in diam., dorsiventrally flattened, not white waxy, closely attached to substrate. Scales pseudopeltate, narrowly ovate or triangular, 1.5-5 × 0.4-1 mm, margin entire, apex acute, clathrate or subclathrate, central region bearing multiseptate hairs at least when young. Fronds not or slightly dimorphic. Stipe present, up to 12 cm, 1-2 mm in diam. Lamina simple, forked, trifid or pinnatifid, narrowly elliptic, 3.5-30 × 0.2-5.5 cm, thinly herbaceous to membranous, abaxial surface often densely covered with clavate hairs, base narrowly decrescent and winged on stipe for a considerable part, margin entire, apex acute to acuminate; veins prominent and distinct, 3-7 mm apart, ± straight or zigzag, dichotomously branched from ca. middle to near margin, connecting veins 1-6 between adjacent secondary veins, anadromous, smaller veins ± sunken and indistinct, or prominent and distinct, each main areole usually including a number of smaller areoles, smaller veins variously anastomosing, free veinlets simple or once or twice forked. Sori separate, irregularly scattered, sometimes forming 2-8 irregular rows between veins, orbicular or in part elongate, superficial or slightly sunken, absent in marginal areoles, generally absent from costal areoles; paraphyses simple, uniseriate hairs with glandular top cells.

Source: [
• 1
]. 

Rhizome long-creeping, 1–2 mm diam., bearing fronds rather closely, densely scaly; scales oblong-lanceolate, gradually narrowing towards apex, round at base, up to 5 by 1.5 mm, brown, distinctly clathrate, the cells rather regular arranged longitudinally, the margin entire. Stipes 0.5 mm or so apart from the next ones, stramineous, with the scales like those on rhizome but smaller in size, up to 15 cm long, winged on upper portion. Laminae simple to trifoliate, simple laminae broadest at lower ⅓ portion, narrowing towards attenuate base, decurrent apex, entire, up to 15 by 3.5 cm, the lateral lobes of trifoliate laminae various in size and form, rarely almost the same as the terminal lobes, usually narrower, terminal lobes like simple laminae; midrib raised on both surfaces, more or less minutely scaly; lateral main veins distinct beneath, the other veins hardly visible or distinct, anastomosing with a row of main areoles along both sides of midrib and many smaller areoles in irregular arrangment; thinly papyraceous to herbaceous, dark green to blackish in colour. Sori round to more or less elongate, many, irregularly scattered on the under surface of fronds.

Source: [
• 10
]. 

On wet rocks in stream-beds in dense gloomy forests at low to medium altitudes less than 800 m alt., usually in spraying water, not so rare throughout the country.

Source: [
• 10
]. 

Thailand, India to Malesia (type from Java), north to S. China and the Ryukyus.

Source: [
• 10
].