Weeds - Goulburn Broken Catchment Management Authority
Weeds - Goulburn Broken Catchment Management Authority
Weeds - Goulburn Broken Catchment Management Authority
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Parthenium hysterophorus<br />
State Prohibited Weed<br />
Parthenium Weed<br />
Description: A branched, pale green, erect herb to 150 cm<br />
tall.<br />
flowers: Flower heads creamy white, 4-10 mm diameter,<br />
found in clusters at the top of branches between January and<br />
June, depending on conditions.<br />
leaves: Deeply divided and covered in soft white hairs. Pale<br />
green and alternate. Base leaves to 20 cm and stem leaves<br />
smaller, all with many segments.<br />
stems: Erect, branched in the upper half and hairy with<br />
vertical grooves.<br />
Note: A prolific seeder and aggressive coloniser producing<br />
15,000 seeds per plant per year. Can cause health problems<br />
such as dermatitis and asthma in some people.<br />
similar Native species: Unlikely to be confused with native<br />
species.<br />
j f M A M j j A s O N D<br />
CONtROl OPtIONs VECtOR Of sPREAD<br />
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