Halophila australis Doty & B.C.Stone

Sea Wrack

Brittonia 18: 306, fig. 2 (1966) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: data deficient (k)

Dioecious herb, glabrous. Scales (3–)4–5(–8) mm long. Leaves firmer than for H. decipiens, green; petiole terete, usually distinctly longer than lamina; lamina narrowly oblong-elliptic, (2.5–)5–6(–7) cm long, 0.5–1.5 cm wide; margin entire; crossveins (10–)14–16(–20) pairs. Floral bracts (4–)5–7(–10) mm long, enclosing a male or a female flower. Male flower with pedicel up to c. 20 mm long at anthesis; perianth 0.5–0.7 mm long. Female flower sessile; hypanthium c. 12 mm long; perianth (0.3–)0.5–1 mm long; styles 6. Fruit (7–)9–11(–13) mm long. Flowers (Oct.–)Nov.–Dec. (Aston 1973).

GipP, OtP, WPro. Also WA, SA, NSW, Tas. Usually occurring in calm water, in sandy and muddy substrates from low tide to a depth of about 23 metres.

Source: Conn, B.J. (1994). Hydrocharitaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
genus Halophila
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Halophila australis in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Halophila australis in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Gippsland Plain present native
Otway Plain present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales
Australian Capital Territory