page_title: Hymenophyllum australe
section_title: Distribution
hierarchical_section_title: Hymenophyllum australe / Distribution
caption_attribution_description: English: Picture of Hymenophyllum australe by Robert Wiltshire
context_page_description: Hymenophyllum australe, commonly known as austral filmy fern, is a relatively large rupestral and epiphytic fern, indigenous to eastern Australia and New Zealand. It belongs to the unique Hymenophyllum genus, which are characterised by their thin membranous fronds that are seldom more than one cell thick, with the exception of regions over and around veins. Hymenophyllum australe is distinctive in that the fronds are typically thicker than other Hymenophyllum species, often being up to 2-3 cells thick.
  Hymenophyllum australe is inconspicuous and will typically form matted patches together with mosses and liverworts. In Australia it takes on an epiphytic approach, commonly seen to clothe roots, trunks and rocks to form a dense mat of foliage; while in New Zealand it adopts a more rheophytic approach, preferring rocks or tree trunks in or close to water.
  It has dark green fronds, which are distinctly deltoid in shape, with entire ultimate segment margins, each containing a single conspicuous vein. It is recognised by its winged fronds, which are initially relatively broad but gradually taper from the rachis along the stipe.
context_section_description: Hymenophyllum australe is a common fern species of eastern Australia, principally located in the rainforests and fern gullies. It is present in Victoria, from the Otways through to Gippsland and was formally present on the Mornington Peninsula, but recently appears extinct in this area owing to bushfires.
  It is also found in Tasmania, southern Queensland and New South Wales, in particular the Blue Mountains area. Hymenophyllum australe is also present on both the north and south islands of New Zealand, although there it is less common than in Australia. 
  In Tasmania and New Zealand it has been noted the wings of the fronds are typically smaller and the segments less wrinkled.
  .
caption: Hymenophyllum australe, picture by Robert Wiltshire.
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