The World Flora Online

Rhizome and juvenile fronds as in Lygodium flexuosum, except rachis thickened at junction of rachis with midribs of lobes of pinnae. Rachis of climbing fronds up to 10 m, up to 2 mm in diam.; primary rachis branches always very short (hardly measurable), ending in a dormant apex covered with brown hairs; secondary rachis branches normally pinnate, rarely somewhat bipinnate and then tertiary branches bearing 1 or more pairs of short spreading lateral pinnae (jointed at base) and a large terminal one; secondary branch system usually consisting of ca. 4(-6) pinnae on each side, and a terminal deeply bilobed pinna (or a pair of pinnae), all pinnae of ± equal size and all stalked, stalks 2-10 mm and thickened at junction with lamina, most often articulate (old pinnae sometimes deciduous but not regularly so as in L. microphyllum); pinnae 4-15 × 0.5-2 cm, base truncate to cordate, margins of sterile pinnae finely crenate-serrate, apex acute and attenuate or subobtuse; lamina thicker than in L. flexuosum; adaxial surface of costae ± hairy especially toward base, abaxial surface often glabrous, veins usually glabrous; sorophores 2-5 mm, usually constricted at base; indusia glabrous; spores finely verrucose.

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• 1
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Rhizome shortly creeping, densely covered with blackish brown hairs. Fronds very large, climbing, to several metres tall; stipes stramineous, minutely pubescent, very narrowly winged or with a distinct line at both sides; rachis like the upper part of stipes, 1.5–2.2 mm diam.; primary rachis-branches very short, up to 4 mm long, the apex dormant, covered with brown hairs; secondary rachis-branches pinnate, with about 4 pairs of leaflets and a terminal usually deeply lobed one; tertiary leaflets oblong-lanceolate, moderately acute at apex, cordate, subhastate or in extreme form 5-lobed at base, minutely dentate at margin, typically 10 cm long, 2.5 cm broad; stalks of leaflets distinct but wanting in smaller leaflets, up to 1.2 cm long, with a distinct junction at base of laminae; lamina herbaceous to soft papyraceous, fresh green, almost glabrous on both surfaces except the hairy margin; every axis higher than the secondary rachis-branches with narrow but distinct wings, pubescent throughout, somewhat swollen at every junction. Sporangia-bearing lobes protruding at margin of tertiary leaflets, 2–5 mm long, about 1.2 mm broad; indusia glabrous.

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• 6
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On rather dry mountain slopes in tropical evergreen forest at low or medium altitudes.

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Thailand, Assam to Yunnan, Indochina, Hainan, Taiwan, throughout Malesia (type form Singapore), southeast to New Guinea and Micronesia.

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Stems used in making handbags and hats.

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• 6
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