Form: perennial
Status: present in WA
Appearance
Erect bushy, aromatic perennial herb, 30-70 centimetres high, reproducing by seed.
Stems: Much branched, square in cross-section, covered in white hairs, woody at base.
Leaves: Hairy on upper surface and very hairy to woolly on the under side. Leaves opposite in pairs, rounded up to seven centimetres diameter and crinkled in appearance. Leaf edge is bluntly toothed, veins sunken on upper surface, prominent on lower side.
Flowers: White, 6-10 millimetres long, formed in dense clusters surrounding the stem at the nodes.
Fruit: Calyx develops into a burr with 10 backward curved hooks.
Seed: Brown or black with four in each burr, one to two millimetres long, oval and slightly roughened.
Agricultural and economic impact
Contaminates wool.
Legal status
The Western Australian Organism List (WAOL) contains information on the legal status of this pest in Western Australia (WA). Search for horehound in WAOL using the scinetific name Marrubium vulgare.
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| MyPestGuide™ Reporter | Pest and Disease Information Service (PaDIS) |
Control method
When using any agricultural chemicals please ensure that you always follow instructions on the label and any permit. Users of agricultural chemical products must always strictly comply with the directions on the label and the conditions of any permit.
Only registered products can be used for weed and pest control.
Control methods for this plant can be found through the APVMA website, use "horehound" as the pest name.