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Information about Australia's flora - Ferns of Australia and PNG
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Medium to large terrestrial ferns, often in swamps or beside lakes. Rhizome slender, long-creeping, with scattered tufts of roots, dichotomous or monopodial, radially symmetric, dictyostelic, bearing thin, ovate, non-peltate scales with marginal and superficial, acicular or glandular, unicellular hairs. Fronds long-stipitate, the stipe with 2 vascular bundles at the base uniting upwards to form a single U-shaped strand, lamina pinnate with pinnately shallow-lobed pinnae, the basel pinnae not reduced, midrib of pinnae grooved above, but the groove not confluent with rachis groove, lower surface of costae with small, think, flat scales, upper surface always with very find unicellular acicular hairs, spherical red or orange glands on abaxial surface of lamina and veins; veins in a pinnate group in each pinna lobe, the basal veins only anastomosing to form an excurrent vein terminating in the sinus (the next acroscopic vein may unite with the excurrent vein and the next basiscopic vein may join it at the sinus), the remainder oblique, free, simple, terminating at the margin. Sori round, indusiate, medial on each vein, the indusium reinform, with unicellular, acicular and glandular hairs on the margin and outer surface; sporangia on a 2-seriate stalk with a long uniseriate seta or uniseriate glandular hair, protected by multicellular glandular paraphyses, the annulus longitudinal, interrupted, of 14-18 thickened cells. Spores monolete, densely and irregularly spinulose and bacculate.

Species in Papuasia

A single species in Papuasia...C. interruptus