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Karroo Thorn

Karroo thorn (Acacia karroo) is declared noxious in the Illawarra District Weeds Authority control area (including Kiama, Shellharbour and Wollongong council areas).

The weed class is 1. This means that:

“The plant must be eradicated from the land and the land must be kept free of the plant”.


Description: No plants of this species are known to exist (now) in NSW or Queensland. It has been eradicated from Western Plains Zoo at Dubbo. It is a large shrub or small tree. It has abundant paired, straight, white thorns 10 cm long. (Thorns to 25 cm have been recorded). Leaves are bipinnate (typical Acacia leaves). The rounded yellow flower-heads are sweetly scented and may appear several time throughout the summer after rains. Pods are sickle shaped but there is a deal of variation in the degree of curving and the degree of constriction between seeds. More likely to be a problem in inland Australia, than on the coast. It is a native of Southern Africa.

Problem: Has the potential to form dense impenetrable thickets. Thorns can cause injury to humans and stock.

Control: Must be reported to the Local Control Authority. Seek their advice. It is important to keep this plant out of eastern Australia.

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