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Information about Australia's flora - Ferns of Australia and PNG
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Thelpteris Schmidel

Terrestrial ferns of moderate size, often in swamps and near lakes. Rhizome slender, short- to long-creeping, irregularly branched, radially symmetric, dictyostelic, bearing brown, ovate, non-peltate scales, with marginal and superficial, acicular of glandular, unicellular hairs. Fronds long-stipitate, the stipes with 2 vascular bundles at the base uniting upwards to form a single U-shaped vascular strand; lamina pinnate with pinately lobed pinnae, the basal pinnae not reduced, midrib of pinnae grooved above but the groove not confluent with rachis groove, surface with unicellualar, acicular or glandular hairs, lower surface of costae with small, think, flat scales with entire margins; veins in a pinnate group in each pinna-lobe, the veinlets free, forked, terminating in the margin. Sori round, indusiate, on the acroscopic branch of each vein, the indusium reniform with glandular hairs on the margin and outer surface; sporangia on a 2-seriate stalk bearing multicellular glandular hairs, unicellular glands present either side of the annulus, the annulus longitudinal, interrupted, of 14-18 thickened cells. Spores monolete, spinose, spinulose and bacculate.

Species in Papuasia

A single species in Papuasia...T. confluens