Description:
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Rhizome erect, less often creeping, short; rhizome scales lanceolate in outline, subentire, clathrate, to 3 mm long, pale brown. Fronds monomorphic, tufted, oblong-lanceolate in outline, 15–60 x 3–9 cm, subcoriaceous, usually proliferous at apex. Stipe 5–16 cm long, green, grooved, with narrow lanceolate scales. Lamina pinnate, basal pinnae not decreasing in size, pinnae decrescent towards apex; pinnae in 7–20 pairs, lanceolate in outline, 2–6 x 0.9–2.3 cm, apex rounded, base unequal, the basiscopic part cuneate, the acroscopic part cuneate and parallel with the rhachis for a bit and there forming a lobe, margin with deep blunt tooth, subsessile, opposite or alternate, at right angles to rhachis; rhachis flattened, narrowly winged upwards, slightly scaly;costa whitish; veins forked in and near acroscopic basal lobe but otherwise unbranched. Sori elongate, many, closely parallel, almost reaching costa and margin, 2–10 mm long; indusium membranous, entire or nearly so, narrow, to 0.5 mm wide. |