Weeds of National Significance

Weeds of National Significance (WoNS) are a list of the most problematic plant species found in Australia based on an assessment on their invasiveness, potential for spread and environmental, social and economic impacts. Consideration was also given to their ability to be successfully managed.

As of May 2020, there are 32 WoNS, 19 are currently found in Tasmania. If you should locate any WoNS not yet recorded or naturalised anywhere in Tasmania, immediately contact Biosecurity Tasmania on 03 6165 3777 to report this weed.

The WoNS listed below are individual species or genera. Please note that some of these species or genera are grouped together as one of the 32 WoNS (e.g. Asparagus weeds, Brooms, Opuntioid cacti, and Bitou bush / Boneseed). Click on the common name to go to the DPIPWE website or the external site for more information from the national Weeds of National Significance website.

Weed Name:

Recorded in Tasmania?

WoNS Website

African Boxthorn Yes
external site
Alligator Weed Yes
external site
Arrowhead (Sagittaria) Not Naturalised
external site
Asparagus aethiopicus No
external site
Asparagus africanus Yes
external site
Asparagus plumosus Yes
external site
Asparagus scandens Yes
external site
Athel Pine Not Naturalised
external site
Bellyache Bush No
external site
Bitou Bush No
external site
Boneseed Yes
external site
Blackberry Yes
external site
Bridal Creeper Yes
external site
Bridal Veil No
external site
Broom – English Yes
external site
Broom – Flax-leaf Yes
external site
Broom – Montpellier Yes
external site
Cabomba Yes
external site
Cat’s Claw Creeper No
external site
Chilean Needle Grass Yes
external site
Fireweed No
external site
Gamba Grass No
external site
Gorse Yes
external site
Hymenachne No
external site
Lantana No
external site
Madeira Vine Yes
external site
Mesquite No
external site
Mimosa No
external site
Opuntioid Cacti Yes
external site
Parkinsonia No
external site
Parthenium Weed No
external site
Pond Apple No
external site
Prickly Acacia No
external site
Prickly Pears Yes
external site
Rubber Vine No
external site
Salvinia Not Naturalised
external site
Serrated Tussock Yes
external site
Silverleaf Nightshade Not Naturalised
external site
Water Hyacinth Recorded in aquaria
external site
Willows Yes
external site