Praxelis: declared pest

Page last updated: Friday, 6 July 2018 - 1:14pm

Please note: This content may be out of date and is currently under review.

Praxelis (Praxelis clematidea) is a declared pest in Western Australia (WA). This article describes the nature of the plant with links to requirements land owners/occupiers must adhere to.

Form : herb — perennial

Status : being actively eradicated from WA


Praxelis is a native of South America that is an erect perennial woody herb up to one metre high. The plant is covered with coarse segmented hairs and it has a pungent aroma.

Leaves: Leaves opposite, somewhat sticky, ovate to rhomboid with a pointed tip, 2.5–6 centimetres long and one to four centimetres wide, gland-dotted and hairy on both surfaces especially below, margins toothed; leaf stalk 0.3–2 centimetres long.

Flowers: Purplish-blue or lilac flowers arranged in flower heads in flat-topped clusters, each head 0.7–1 centimetres long.

Seed: two to three millimetres long, black, crowned with bristles about four millimetres long.

Agricultural and economic impact

A weed of rangelands and tropical crops.

Declared pest category

The Western Australian Organism List (WAOL) contains information on the area(s) in which this pest is declared and the control and keeping categories to which it has been assigned in Western Australia (WA). Use the links on this page to reach praxelis in WAOL.

Requirements for land owners/occupiers and other persons

Requirements for land owners/occupiers and other persons if this pest is found can be sourced through the declared plant requirements link.

Search > detect > report

Report: this pest to the Pest and Disease Information Service using the contact details given below or by using the MyWeedWatcher smartphone and tablet application or online reporting tool.

Control method

This pest is being eradicated from WA. Report the presence or suspected presence of this organism to the Pest and Disease Information Service before undertaking a control measure. Further information will be supplied after reporting.

Contact information

Pest and Disease Information Service (PaDIS)
+61 (0)8 9368 3080