Skip to main content

Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Monday, 2 March 2026 +08:00.

Advanced Search

Chenopodium ambrosioides L.
Mexican Tea

This name is not current. Find out more information on related names.

Reference
Sp.Pl. [Linnaeus] 1:219-220 (1753)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status
Not Current

Perennial, herb, 0.2-1 m high, strongly aromatic. Fl. green, mainly Mar to Jul. Sand, sandy clay.

Grazyna Paczkowska, Descriptive Catalogue, 14 September 1995

Management Notes (for the Swan NRM Region)

Alternative Names. Wormseed.

General Biology. Growth form. Herb. Life form. Perennial. Reproduction. Seed. Dispersal. Soil, machinery, water.

Notes. NAME CHANGE.

Additional information. Origin. Tropical America.

Suggested method of management and control. Hand remove small populations (use gloves); Suggest metsulfuron methyl 0.7 g/10 L (20 g/ha) + Pulse® before flowering or 1 % glyphosate + Pulse®. Read the manufacturers' labels and material safety data sheets before using herbicides. For further information consult the Australian Pesticides and Veterinary Medicines Authority to determine the status of permits for your situation or state.

Management Calendar

Calendar Type Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Comments
Germination                          
Active Growth                          
Flowering                          
Fruiting                          
Manual Removal                          
Herbicide Treatment                          

Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.

 

References

  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
  • Dixon, B. & Keighery, G. (1995) Weeds and their control. In Managing Perths bushlands (eds. M. Scheltema and J. Harris). Greening Western Australia, Perth.
  • Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. & Cousens, R.D. (2007) Western Weeds. A guide to the weeds of Western Australia. 2nd Edition. The Plant Protection Society of Western Australia, Victoria Park.