Parthenium weed
Parthenium hysterophorus
family
Asteraceae
origin
Exotic
declaration
Category 3 Restricted Matter (Biosecurity Act 2014)
Must not be distributed or disposed. This means it must not be released into the environment unless the distribution or disposal is authorised in a regulation or under a permit.
Common names
Parthenium weed, False ragweed, Bitter weed, Carrot grass, Congress grass, Parthenium, Santa Maria.
A short-lived herbaceous plant forming a basal rosette of leaves in the early stages of growth. Later producing an upright stems that are ribbed lengthwise, hairy, and much-branched at maturity. Its leaves are deeply divided and fern-like in appearance, but are smaller towards the top of the plant. Large numbers of small white flower-heads (4-5 mm across) are borne at the tips of its branches. These flower-heads produce five small winged 'seeds' (about 2 mm long).
Impact
Impact
Parthenium weed (Parthenium hysterophorus) is one of the 20 Weeds of National Significance (WoNS). It is regarded as a significant evironmental weed in Queensland, and as a potential environmental weed in New South Wales, Victoria, the Northern Territory and Western Australia.
Location
Location
Characteristics
Characteristics
Similar Species
Similar Species
Parthenium weed (Parthenium hysterophorus) is one of the 20 Weeds of National Significance (WoNS). It is regarded as a significant evironmental weed in Queensland, and as a potential environmental weed in New South Wales, Victoria, the Northern Territory and Western Australia.
