Karoo and giraffe thorn
Vachellia karroo (Hayne) Banfi & Galasso declared as Acacia karroo Hayne and Vachellia erioloba (E. Mey.) P.J.H. Hurter declared as Acacia erioloba E. Mey. Karoo thorn
Karoo thorn and giraffe thorn are State prohibited weeds
State prohibited weeds are the highest category of declared noxious weeds in Victoria. By definition they are either not yet in Victoria, or are here in small numbers, where their eradication is still possible.
All sightings should be reported to Agriculture Victoria immediately by calling 136 186 or emailing firstname.lastname@example.org.
Why is it important to report karoo thorn and giraffe thorn sightings to Agriculture Victoria?
Karoo thorn is one of the most widespread trees in southern Africa and is a weed in Europe, South America and South Africa. It has the potential to invade southern Australia, particularly in open grasslands and rangelands in the south-east.
The spines injure grazing animals, and make thickets impenetrable. Giraffe thorn has been assessed as potentially highly invasive in Australia. Climate predictions indicate that it could occupy large areas of inland and northern Australia.
Karoo thorn has been introduced into Victoria through plantings in botanic gardens, zoos and public parks, however giraffe thorn has not been recorded in Australia. These trees have the potential to invade large areas of regional Victoria if introduced and not removed.
How to identify karoo thorn and giraffe thorn
Karoo and giraffe thorn plants can grow as either shrubs or trees. Karoo thorn grows 4–25 m tall and giraffe thorn grows 2–16 m tall.
The white paired spines of the Karoo thorn can grow up to 25 cm. Giraffe thorn spines are also paired and white but only grow up to 6 cm long and often have a swollen base.
What should you do if you find karoo thorn or giraffe thorn?
If you think you have seen karoo thorn or giraffe thorn, please contact Agriculture Victoria on 136 186 or email email@example.com.
Please do not attempt to treat or dispose of this weed yourself. Agriculture Victoria will treat, remove and dispose of karoo thorn or giraffe thorn safely, at no cost to the land owner.