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Annual thunbergia


Have you seen Annual thunbergia?

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

Call us on 13 25 23.

Native to arid parts of northern Africa, annual thunbergia is an erect, annual herb that can degrade the banks of creeks and rivers and threaten native vegetation. While it has not yet been found in Australia, it has the potential to be a major threat to tropical and subtropical areas if released here.

Unlike many other species of thunbergia, annual thunbergia is not a climbing vine.

Annual thunbergia is a is a prohibited invasive plant under the Biosecurity Act 2014.

Scientific name

Thunbergia annua


  • Annual herb up to 35cm tall.
  • Leaves are smooth, arranged in opposite pairs along stem.
  • Flowers are white, about 2cm long, may have cream centre.


  • Prefers frost-free locations.


  • Has not been found in Australia, but has potential to spread across tropical and subtropical areas, including Queensland.

Life cycle

  • Reproduces from seed and root pieces.



  • Could threaten remnant vegetation in Wet Tropics.
  • Degrades banks of creeks and rivers.

How it is spread

  • Seeds spread by natural and human processes.
  • Also spread vegetatively by root pieces moving along riverbanks during floods, or in earth removed from infested sites for fill or other soil use.


  • Call 13 25 23 if you find a plant you suspect may be annual thunbergia to seek advice on control options.

Legal requirements

  • Annual thunbergia 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 that 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