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The Yellow Oleander plant (Cascabela thevetia syn:Thevetia peruviana) is not only a highly toxic plant that is poisonous to adults and children, but also to animals. In fact, the entire yellow oleander plant is poisonous from the leaves to the flowers, the stems to the seeds. The ingestion of as little as a single leaf can be enough to kill a child.

The Yellow Oleander is a common, outdoor woody shrub found in warmer climates, often used for edging freeways or gardens. It has fragrant, yellow, petunia-like flowers with poisonous sap. This plant is grown around Brisbane and in many tropical towns.

Whilst this plant is commonly referred to as an Oleander, it is, however, not related to the Nerium oleander. It is also known as the be still tree, Captain Cook tree, Cook tree, foreigner’s tree, lucky nut, or Mexican oleander.

Brisbane City Council Impact and Control Measures

Notifiable – No
Council declaration – Class R – Reduce populations

This species is regarded as an environmental weed in south-eastern Queensland, where it is on the list of the top 200 invasive naturalised plants, and as a priority weed in far northern Queensland. It has already become established in conservation areas in south-eastern Queensland (e.g. St. Helena Island National Park near Brisbane), as well as in bushland and riparian areas, and has also been reported to invade coastal vegetation in northern Queensland (e.g. at Balgal Beach near Townsville).


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