Photo guide to weeds

Thunbergia laurifolia

  • Thunbergia laurifolia flower
    Thunbergia laurifolia flower
  • Photograph of an infestation of the Thunbergia laurifolia plant
    Photograph of an infestation of the Thunbergia laurifolia plant

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General information

Thunbergia laurifolia is a perennial climbing vine native to India and Malaysia. Thunbergia laurifolia is very similar in appearance and habit to Thunbergia grandiflora. Thunbergia laurifolia was introduced to Australia as a garden ornamental but has escaped into native vegetation.

Biosecurity Queensland encourages people report this Class 1 pest plant and take actions to help stop the establishment, prevent the spread, and to control this pest.

Overview

Scientific name

Thunbergia laurifolia

Similar species Thunbergia annua, Thunbergia grandiflora, Thunbergia fragrans
Description
  • Large trumpet-shaped blue flowers
  • Leaves are oval and narrow with a pointed tip 10cm long, 15cm wide that grow in opposite pairs.
  • Seed capsules brown, 1cm long by 4cm wide.
  • Capsules contain two to four seeds with a hollow inner surface.
  • Tuberous root system which can resprout.
Habitat
  • Grows in moist areas at low elevations.
  • Most successful in frost-free locations.
Distribution
  • Native to India and Malaysia.
  • Widespread throughout gardens of Queensland.
  • More frequent infestations are being found over a wide area.
Life cycle Reproduces vegetatively, when cuttings or fragments of stems and roots take root and send out new shoots.
Spread Root pieces can spread by floodwater.
Impacts

Environmental

  • Major threat to remnant vegetation in the wet tropics.
  • Climbs native vegetation, smothering, shading out and killing the understorey.
  • Often pulls down mature trees with the weight of the vine.
Prevention
  • The best form of weed control is prevention. Treat weed infestations when they are small - do not allow weeds to establish.
  • Ways to prevent weed spread
Declaration details
  • A declared Class 1 species under the Land Protection (Pest and Stock Route Management) Act 2002.
  • Not commonly present or established in Queensland and has the potential to cause impacts to whole or part of the State.
  • Introduction, keeping, releasing and supplying (including supplying things containing reproductive material of this pest) is not possible without a permit, for special purposes, issued by Biosecurity Queensland.

Last updated 23 January 2013