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Rumex bidens


Rumex bidensmud dock

Group:Magnoliophyta (flowering plants), Magnoliopsida (dicots), Polygonales, Polygonaceae
Status:Threatened Species Protection Act 1995: vulnerable
Environment Protection and Biodiversity Conservation Act 1999: Not listed
Found in Tasmania and elsewhere
Click to enlarge
Rumex bidens (mud dock) is a distinctive aquatic to semi-aquatic species, known in Tasmania from about a dozen sites ranging from Low Head in the north to Pontville in the south, though many sites have not been seen in recent years. Available information suggests that subpopulations are very small in numbers and the area that they occupy placing the species at risk of losses from chance events. The risk of inadvertent losses is exacerbated as the species may not emerge when its habitat is dry, sometimes for many years. Threats to the species and its wetland habitat include changes to hydrological processes for irrigation and conversion for agriculture, stock browsing and trampling, and competition. The species would benefit from retention of buffering vegetation surrounding its waterway and wetland habitat, and known occurrences would benefit from stock management.

A complete species management profile is not currently available for this species. Check for further information on this page and any relevant Activity Advice.​

Key Points

  • Important: Is this species in your area? Do you need a permit? Ensure you’ve covered all the issues by checking the Planning Ahead page.
  • Important: Different threatened species may have different requirements. For any activity you are considering, read the Activity Advice pages for background information and important advice about managing around the needs of multiple threatened species.


Helping the species

Cutting or clearing trees or vegetation






Changing water flow / quality

Use of chemicals


Further information

​Check also for listing statement or notesheet pdf above (below the species image)​.

​​Cite as: Threatened Species Section (). (): Species Management Profile for Tasmania's Threatened Species Link. ​ ​Department of Natural Resources and Environment Tasmania. Accessed on .

Contact details: Threatened Species Section, Department of Natural Resources and Environment Tasmania​, GPO Box 44, Hobart, Tasmania, Australia, 7001. Phone (1300 368 550).

Permit: A permit is required under the Tasmanian Threatened Species Protection Act 1995 to 'take' (which includes kill, injure, catch, damage, destroy and collect), keep, trade in or process any specimen or products of a listed species. Additional permits may also be required under other Acts or regulations to take, disturb or interfere with any form of wildlife or its products, (e.g. dens, nests, bones). This may also depend on the tenure of the land and other agreements relating to its management. ​​​​​