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Anchored water hyacinth


Have you seen Anchored water hyacinth?

Be on the lookout for Anchored water hyacinth and report it to Biosecurity Queensland. Early detection and reporting are the key elements in controlling Anchored water hyacinth.

Call us on 13 25 23.

Native to tropical America, anchored water hyacinth is an aquatic plant. It is closely related to one of the world's worst aquatic weeds, water hyacinth. Anchored water hyacinth smothers the surface of creeks, lakes and other water bodies. It has not yet been found in Australia.

Anchored water hyacinth is a prohibited invasive plant under the Biosecurity Act 2014.

Scientific name

Eichhornia azurea

Similar species


  • Looks similar to water hyacinth.
  • Leaves are glossy, round, generally broad-ovate, 5–16cm long, 2–16cm wide.
  • Stems are smooth and branched. Flowering stems are 8–12cm above water.
  • Flowers are attractive, funnel-shaped, purple, with 6 toothed petals 1–3cm long.
  • Seeds are 1–2mm long.


  • Can survive either free-floating on the water surface or rooted into the mud.


  • Currently not known to exist in Queensland.

Life cycle

  • Flowers in summer and autumn.
  • Seeds germinate in spring.



  • Smothers surface of creeks, lakes and other water bodies.


  • Interferes with pumping and irrigation equipment, and structures such as bridges and dams.

How it is spread

  • Broken fragments and seeds can spread by water, vehicles and birds.


  • Control measures are not currently required in Queensland.

Legal requirements

  • This is a prohibited invasive plant under the Biosecurity Act 2014.
  • It must not be kept, moved, given away or sold into the environment without a permit.
  • The Act requires all sightings to be reported to Biosecurity Queensland within 24 hours.
  • By law, everyone has a general biosecurity obligation (GBO) to take all reasonable and practical steps to minimise the risk of spreading until they receive advice from an authorised officer.

Further information