A large flowering shrub native to Central and South America that readily grows into thickets. Introduced to Australia as an ornamental garden plant in about 1841,
What it causes: A hepatogenous photosensitisation due to triterpene acids.
A toxic dose for a 500 kg cow varies from about 5 to 20 kg of fresh leaf (1% or more of an animal’s body weight), depending on the toxin content of the lantana eaten. All lantana should be treated as poisonous to stock. Red flowered varieties are thought to be the most toxic but some white and pink flowered varieties can also be highly toxic.