An Australian Government Initiative [logo]
Information about Australia's flora - Ferns of Australia and PNG
ANBG logo
Home > Gardens | CANBR > ferns > taxa

Thysanosoria Gepp

Medium size, high-climbing epiphytes. Rhizome vertically long-creeping, stout, little-branched, bearing roots ventrally and fronds in 3 or more dorsal rows, dictyostelic with a large +/- channelled ventral strand producing root traces, and 2 or more dorsal wedge- shaped strands, large overlapping leaft gaps with leaf traces of several to many strands arranged in a ring; scales on young parts broad, flat, thin, concolorous, peltate or perfoliate, the margins +/- fringed with hairs. Stipes long, +/- terete, with 2 continuous aerophores, the stipe and aerophores both gradually decurrent into the ridges of the rhizome, the vascular bundles in a simple open ring, the 2 adaxial bundles larger; lamina simply pinnate, the lateral pinnae articulate to the rachis, terminal pinna not so, the pinnae +/- equal, lanceolate, chartaceus, glabrescent, margins entire; the veins free, simple or forked, parallel and terminating in the cartilaginous margin, no main veins; fertile pinnae contracted, crenate. Sporangia borne in discrete hemispherical sori terminal on each vein on the marginal lobes; exindusiate, paraphyses lacking, annulus longitudinal, interrupted, (? like Lomariopsis). Spores monolete, with a broadly winged, folded perispore.

Species in Papuasia

A monotypic genus... T. pteridiformis