Asplenium obtusatum G.Forst.

Shore Spleenwort

Fl. Ins. Austr. 80 (1786) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Two subspecies have been recognised in Asplenium obtusatum. Each subspecies corresponds to a separate ploidy level with the nominate subspecies tetraploid and Asplenium obtusatum subsp. northlandicum octoploid. The two ploidy levels differ in spore size and in scale shape. Australian material of A. obtusatum have scales that are narrowly triangular and produce spores with mean lengths of 43.8–54.6 µm long (Brownsey 1998) consistent with Asplenium obtusatum subsp. northlandicum. Asplenium obtusatum subsp. northlandicum was shown to be most likely an allooctoploid with Asplenium obtusatum and an unknown species as its parents (Shepherd et al. 2008). It is general practice in fern taxonomy to recognise allopolyploids at the rank of species (Barrington et al. 1989) and consequently the octoploid is recognised at species rank in New Zealand but under the name Asplenium decurrens Willd. which is an earlier name for Asplenium northlandicum and takes preference (Brownsey & Perrie 2016). In Australia this taxon is still recognised at subspecies rank following previous Australian treatments (e.g. Brownsey 1998). See subspecies profile for description.

EGL, GipP, VVP, WPro.

Source: Entwisle, T.J. (1994). Ferns and allied plants (Psilophyta, Lycopodiophyta, Polypodiophyta). In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Daniel Ohlsen, 2016-10-14
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
order Polypodiales
family Aspleniaceae
genus Asplenium
Higher taxa
Subordinate taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Asplenium obtusatum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Asplenium obtusatum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Gippsland Plain present native
East Gippsland Lowlands present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
New South Wales
Australian Capital Territory