Parthenium hysterophorus

Family Asteraceae

Species Profile

Species classification Invasive [Weeds of National Significance; NSW's Noxious Weeds]
Common namesBitter Weed, Carrot Grass, False Ragweed, Parthenium Weed
SynonymsParthenium lobatum Buckley
Growth formHerb
Seed dispersal morphologyHydrochorous (buoyant seed), Wing/Achene/Pappus
Maximum height (m)2
Capable of vegetative reproductionNo
Native rangeCentral America, North America, South America, West Indes
Exotic range (Australia)NSW, NT, QLD
Exotic range (other)Australia, Africa, Asia, North America, Oceania, Indian Ocean Islands, Pacific Ocean Islands
Habitat types (exotic)Agricultural land, Disturbed areas (including trails), Grasslands, Pastures, Roadsides, Urban areas, gardens and parks, Wastelands
Soil type (exotic)Alkaline, Clay, Fertile
Decade of introduction1940

National Climate Change Impact

Invasive Class 3

The area of suitable habitat and the habitat suitability of observations, for this species, are projected to decrease or remain the same under RCP 8.5 2065 compared to current climate suitability.

Maps of Habitat Suitability & Recorded Occurrences

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Current suitable habitat

2035 suitable habitat
(RCP 8.5)

2065 suitable habitat
(RCP 8.5)

Recorded occurrences

Recorded occurrences


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