- Widespread distribution. In Australia, FSM, Fiji, Guam, Nauru, New Caledonia, Palau, Samoa, Solomon Islands, Vanuatu.
- Invasive vine. Blankets remnant native tropical forests, pastures, roadsides, banks of streams and rivers. Major threat to biodiversity. Tubers damage river banks, paths, fences, foundations.
- Stems to 15 m, square when young. Large tubers to 70 kg. Leaves, opposite, arrow-shaped, variable with pointed outgrowths. Flowers, blue, violet, mauve, trumpet-shaped from five fused petals (one larger) with yellow throats. Seeds flat, explosively discharged.
- Spread: seeds, vegetative parts moved by humans, livestock, vehicles, water. Via international trade in ornamental plants. Escape from cultivation.
- Biosecurity: high risk; listed as invasive species in many countries. In Australia, prohibited to give away, sell or release in environment. On IUCN database Global Invasive Species.
- Biocontrol: none.
- Cultural control: hand-pulling; collect stem pieces and burn. Avoid using topsoil where blue trumpet grown previously.
- Chemical control: in Australia, imazapyr, either: (i) spray to run off and when actively growing; or (ii) cut stem/tuber technique - make 'V'- shaped cut in stem or tuber and apply. (See label for quantities; more than one application maybe needed.)
