Hydrilla verticillata (L.f.) Royle


Ill. Bot, Himal. Mts 1: 376 (1839) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: rare (r)

See generic description for diagnostic features.

GipP, MuF, MuM, RobP, VRiv. All mainland States. Naturalized in south-east North America. Recorded from scattered localities along the Murray River between Yarrawonga and Mildura, and possibly occurring further downstream (Aston 1973). In still to slow-flowing freshwater of lakes and streams, to a depth of at least 3.5 m. Male flowers recorded in May.

The flowers are air-pollinated. The hypanthium of the female flower elongates such that the flower reaches the water surface and the floating male flowers release the pollen explosively (see Aston 1973 for details).

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 Hydrilla
Higher taxa


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

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales