Parthenium weed

Family: Asteraceae
Scientific name: Parthenium hysterophorus
Description: Plant Form: Annual rosette multi-branched herb. Size: 50 cm to 2 m tall. Stem: Erect and ribbed single stem, many branched above. Leaves: Initially rosette, upper leaves deeply divided, covered in soft fine hair. Flowers: Creamy white, in circular clusters, loosely branched in flowerhead. Dotted with resin. Fruit and Seeds: Seeds tiny 1-2 mm across, triangular, brown to black. Habitat: Roadsides, paddocks, flooded areas. Distinguishing Features: Creamy white daisy-like flower clusters, and ribbed stems distinguish from Ragweed (Ambrosia species). Weed Status: Priority Weed Weed Type: Environmental, Agricultural, Common Lifeform: Herbaceous

Example images for this weed

National and state/territory profiles for this weed

Weeds Australia
NSW WeedWise (NSW)
! Should be reported
DEECA (VIC)
! Should be reported
QDAF (QLD)
! Should be reported
PIRSA (SA)
! Should be reported
DNRE (TAS)
! Should be reported
DEPWS (NT)
! Should be reported
NSW WeedWise (ACT)
! Should be reported