2.5. Introduced Flora

Plant species have been introduced to benefit agriculture or agroforestry, to avert soil erosion and provide windbreaks, and for a range of commercial and economic purposes. Where these species escape from cultivation, they can quickly become problematic. The following species are regarded as Weeds of National Significance (WONS), and are known to be established in the ACT:
• Blackberry (Rubus fruticosus agg.)
• Chilean needle grass (Nassella neesiana)
• Gorse (Ulex europaeus)
• Serrated tussock (Nassella trichotoma)
• Willows (Salix spp.)
• Alligator weed (Alternanthera philoxeroides)
Many other problematic species occur in the region, including Bathurt burr (Xanthium spinosum), Noogoora burr (Xanthium occidentale), St. John’s wort (Hypericum perforatum), Paterson’s curse (Echium plantagineum), capeweed (Arctotheca calendula), and many thistles.

References and Resources
• Territory and Municipal Services. 2006. Invasive species management in the ACT.

• Weeds Australia. Undated. Weed Identification (South Eastern Highlands)