Small to moderate-sized climbing epiphytes, subepiphytes or casually terrestrial. Rhizome long-creeping, slender to chick, bearing roots at intervals along the ventral surface, densely covered with brown, ovate to lanceolate, entire, non-clathrate, peltate-based scales, +/- fleshy, dictyostelic, the stele dorsiventral with a single large flattened or arc-like ventral meristele and 5 smaller +/- terete meristeles (leaf traces) in a dorsal arc. Fronds long-stipitate, the stipes not articulate to the rhizome, remote, scaly at the base, +/- terete, grooved and sometimes winged upwards, the grooves and wings continuous wiht those of the higher order rachises, the axes prominent and continuous in the grooves so-fromed, fibrovascular bundles 5 in a U-shape with the 2 adaxial bundles larger, the lamina deltoid, pinnate-pinnatifid to bipinnate-pinnatifid, the basal acroscopic pinnules nearer to the rachis than the basiscopic pinnules (anadromous), the ultimate segments obtuse or crenate, +/- costate, coriaceous or subcoriaceous, glabrous, veins free, simple or forked, terminating in an intrmarginal hydathode int eh crenations. Sporanagia borne in discrete round sori dorsal or subterminal on the veins, superficial, indusium thin, orbicular-peltate; paraphyses absent, pedicel long, 3-seriate, annulus longitudinal, interrupted of c. 14 thickened cells. Spores annolete, pale brown with a wrinkled or winged perispore.
Species in Papuasia
|A single species in Papuasia...||R. adiantiformis|