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Information about Australia's flora - Ferns of Australia and PNG
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Platycerium Desv.

Medium to large epiphytes or occasionally petrophytes solitary or colonial, with board substate-clasping, detritis-collecting base fronds and erect or pendulous, sterile or fertile, foliage fronds. Rhizome short-creeping, except for the apex concealed by a massof fronds and roots, apex with basally attached or subpeltate, fringed or entire scales, dictyostelic, sometimes polycyclic, roots numerous, growing between and through the fronds. Fronds +/- sessile, dimorphic: foliage fronds substipitate, articulate to short phyllopodia, +/- erect, the apical portion sometimes pendulous, simple or many-times dichotomously branched into strap-like segments, symmetric or asymmetric, lacking costae, main veins dichotomous and +/- parallel, secondary veins obscure, anastomosing to form areoles with included, free, branched veinlets, fleshy to subcoriaceous, stellate-pubescent, margin entire; base fronds persistent, asymmetric, lacking midrib, broad and shield-like, basally cordate, thick and fleshy, stellate-pubescent, apically entire or +/- dichotomously lobed with foliaceous extensions and persistently green, or lacking such extensions and bowning early. Sporangia acrostichoid, entirely covering broad patches, medial to apical on foliage fronds, or on expansions of the lamina or on specialised lobes of the foliage fronds, served by a secondary vascular system, exindusiate, densely protected by stellate paraphyses, annulus longitundinal, complete or incomplete, pedicel 3-seriate. Spores monolete, translucent, smooth.

Species in Papuasia

1a. Large solitary ferns; base fronds deeply lobed apically and persistently green; fertile fronds pendulous, the sorus on a enlarged lobe of the lamina P. wandae
Medium size ferns, budding laterally and colonial; base fronds not lobed apically, browning early; fertile frond erect, sorus towards ends of branches of normal foliage fronds (very likely introduced) P. bifurcatum ssp. hillii