Bathurst burrs
Xanthium spinosum
Unisexual, male flowers in terminal spikes, female flowers in leaf axils. Flowers all year, mostly summer and autumn.
Annual herb to 1 m high. Stems downy, spines 0.7–2.5 cm long. Leaves with prominent veins in middle of each lobe. Straw-coloured burrs each contain two brown or black seeds.
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Plant Protection Products
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