Onopordum acaulon

Family Asteraceae

Species Profile

Species classification Invasive [WoNS shortlist (pre-2012); NSW's Noxious Weeds]
Common namesHorse Thistle, Stemless Onopordon, Stemless Onopordum
SynonymsOnopordum acaule orth. var. J.M.Black
LongevityAnnual, Biennial
Growth formHerb
Seed dispersal morphologyWing/Achene/Pappus
Maximum height (m)Information unavailable
Capable of vegetative reproductionYes
Native rangeNorthern Africa, south western Europe
Exotic range (Australia)NSW, SA, VIC, WA
Exotic range (other)Information unavailable
Habitat types (exotic)Agricultural land, Pastures, Riparian Systems, Roadsides, Wastelands
Soil type (exotic)Alkaline, Sandy
Decade of introduction1840

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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