This is an ornamental South American herb belonging to the daisy family, Asteraceae. It is rapidly becoming the most serious threat to the conservation of grasslands in South Africa.
Infestations become conspicuous when the plants are in flower between December and March, transforming the veld from green to pink. The plant initially establishes itself in disturbed sites such as roadsides, but then invades natural grasslands, open savanna and wetlands.
This weed displaces native species, reducing both the biological diversity and carrying capacity of vleis and veld. Information from: The Agricultural Research Council (ARC)