Rhizome dorsiventrally flattened, 1-9 mm wide, long-creeping, internodes 10-75 mm long, not white waxy, roots densely set, forming a thick mat. Vascular strands 7-15, with sclerified sheaths, sclerenchyma strands absent. Rhizome scales peltate or pseudopeltate, sparsely set, appressed or slightly spreading, ovate, narrowly ovate or triangular, 3.5-10 by 1-2.5 mm, margin denticulate to dentate, clathrate with a hyaline margin, central region glabrous. Fronds not or slightly dimorphic (occasionally dimorphic in New Guinea), stipitate, herbaceous. Stipe up to 12 cm long, 3-5 mm thick; lamina simple, nearly round to narrowly obovate, 3-70 by 2-17 cm, index 0.8-7.5, base cordate, auriculate to narrowly angustate, decurrent to a long wing, margin entire, apex rounded to acuminate, lower surface without acicular hairs. Venation: veins prominent and distinct, 7-30 mm apart, more or less straight, dichotomously branched below the middle to near the margin, catadromous; connecting veins forming one row of large areoles parallel to the costa, bordered by several smaller areoles, costal areole, if present, formed by smaller veins (venation irregular in nearly circular fronds); included venation prominent and distinct, variously anastomosing; free veinlets simple to twice forked. Sori separate, round or elongate along veinlets, superficial or slightly immersed, 1.5-3 by 3-5 mm, mostly irregularly scattered on the veins or the free included veinlets, 2-15 per sq.cm, on the whole surface of the lamina or absent from the basal part for 0.7 of the total length of the lamina, present or absent in marginal areoles, generally present in costal areoles; paraphyses simple uniseriate hairs with glandular topcells, 1-3-celled.
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A fern with a thin rhizome. It is long and creeping. They creep on high trees. The fronds are 15-40 cm long. The fronds do not have stalks. They have expanded bases which surround the stem. They are broadly oval but constricted near the base. The leaflets are sword shaped in the upper part and taper to the tip. The roots form soft masses covered with brown hairs. The spore producing bodies are few and are scattered.
Usually an epiphyte found on lower branches of trees, sometimes higher, rarely found on rocks or in the soil, growing in shady, moist places in some types of primary and secondary forest; at elevations up to 1,650 metres.
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A tropical plant. Plants grow on trees in primary and secondary rainforest.
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