Parthenium weed invades pastures and crops. It causes severe human health problems including:
Parthenium weed has recently been found in many locations across NSW.
Look for it where:
It usually grows up to 1.5 m tall but can be up to 2 m tall.
Leaves are pale green and covered in soft fine hairs. Lower leaves are 5–20 cm long and deeply divided. Upper leaves are smaller and less divided.
Flowers are creamy white, 4–6 mm across and star-like with 5 distinct corners. Flower clusters are delicate and look a bit like "baby 's breath".
Stems are grooved, woody when older, and have many branches when flowering.