Rhizome short-creeping, bearing fronds close together, its apex and bases of stipes densely covered with dark hairs. Juvenile fronds once dichotomous, each branch bearing a palmatisect leaflet, usually 5-lobed, with truncate base, edges closely and irregularly serrate. Rachis of climbing fronds hardly 2 mm diameter, usually glabrous; primary rachis-branches very short, dormant apex covered with pale brown hairs having swollen bases; secondary rachis-branches rarely bearing a simple leaflet, most commonly once dichotomous, one branch with a simple, one with a forked leaflet, less often each branch with a simple leaflet; sterile leaflets 12-20 cm long, 12-30 mm wide, subacute, edges not thickened, very shallowly serrate, base usually asymmetric and strongly cordateauriculate on the outer, rarely on both sides, costae glabrous except near the base on upper surface; lamina of fertile leaflets 12-20 mm (rarely to 30 mm) wide, sorophores 3-9 mm long, constricted at the base, at the apices of short triangular lobes of the lamina; indusia glabrous; spores irregularly warty, variable as between different specimens, in some cases resembling those of L. longifolium, in others with many smaller warts of variable size.
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