Frond-form as T. kingii but basal pinnae shorter (to c. 25 cm), their basal basiscopic pinnules bearing at most one pair of adnate tertiary leaflets; veins often forming additional areoles below sinuses in sterile fronds, not in fertile ones; hairs always present on lower surface of costae, costules and veins, variable, sometimes to 1 mm long, few or none between veins; hairs on upper surface between veins abundant, at least 1 mm long (to 1.5 mm); sori exindusiate, usually rather large and slightly irregular in shape.
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