Annual ragweed (Ambrosia artemisiifolia) is a fast-growing, invasive herb that typically reaches 1 - 2 meters in height. It has deeply divided, fern-like leaves and produces small, greenish flowers in elongated spike.
Source: NSW Weed Wise 2022, NSW Weed Wise, NSW Department of Primary Industries, accessed 9 May 2025, < https://weeds.dpi.nsw.gov.au/Weeds/AnnualRagweed>.
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