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Information about Australia's flora - Ferns of Australia and PNG
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Phanerosorus Copel.

Pendulous or straggling ferns of moderate size, on cliffs (? Always limestone). Rhizome creeping with moderately spaced fronds, densely clothed with pale yellow-brown, multiseptate hairs, solenostelic, polyclclic with 2 concentric cylinders of vascular tissue. Fronds sympodial, the rachis and stipe long, not articulate to the rhizome, terete, glabrous with a single V-shaped vascular bundle the suppressed lateral branches pseudodichotomous at the very base with a dormant medial bud, the bud often developing into a secondary sympodial rachis, the segments leafy throughtout, linear, or dichotomous, or +/- sympodial, the lobes entire, costate, coriaceous, glabrous, the veins simple or 1-3 times forked, free, terminating in the cartilaginous margin. Sporangia few, on the acroscopic branch of a vein-group, borne in discrete round sori at the ends of simple veins, in a single medial row either side of the costae, completely covered by a peltate deciduous indusium, paraphyses lacking, pedicel very short, thick, annulus oblique, incomplete, often crooked, without a definite stomium. Spores trilete, tetrahedral, translucent, smooth ro very finely verrucose.

Species in Papuasia

A single species in Papuasia...P. sarmentosus