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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.

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Brachychiton populneus (Schott & Endl.) R.Br.
Kurrajong

Reference
Pl.Jav.Rar. 234 (1844)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status
Current

Tree, 3-7(-20) m high. Fl. green-cream/white, Dec.

Amanda Spooner, Descriptive Catalogue, 21 September 1999

Distribution

IBRA Regions
Avon Wheatbelt, Coolgardie, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain.
IBRA Subregions
Geraldton Hills, Katanning, Northern Jarrah Forest, Perth, Southern Cross.
Local Government Areas (LGAs)
Capel, Chittering, Greater Geraldton, Murray, Northam, Perth, Serpentine-Jarrahdale, Subiaco, Yilgarn.

Management Notes (for the Swan NRM Region)

General Biology. Growth form. Tree. Reproduction. Seed. Dispersal. Birds, rats and possibly other mammals. Time to first flowering. Possibly 8+ years. Vegetative regeneration strategy. Resprouts. Woody structure. Diffuse porous. Seedbank persistence. Short, days-1 year. Fire response. Can resprout from basal dormant buds following fire.

Notes. Semi deciduous in winter.

Additional information. Origin. Eastern Australia. History of use/introduction. Garden escape, planted as a street tree.

Suggested method of management and control. Hand pull seedlings. For mature plants try stem injection with 50-100% glyphosate or apply 250 ml Access® in 15 L of diesel to basal 50 cm of trunk (basal bark) or cut and paint with 50% glyphosate. 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
Flowering               O Y Y Y O  
Fruiting     Y Y Y Y Y            
Optimum Treatment Y Y Y Y         Y Y Y Y  

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.
  • Buist, M., Yates, C.J. & Ladd, P.G. (2000) Ecological characteristics of Brachychiton populneus (Sterculiaceae) (kurrajong) in relation to the invasion of urban bushland in south-western Australia. Austral Ecology, 25: 487-496.
  • 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.
  • Navie, S. & Adkins, S. (2008) Environmental Weeds of Australia, An interactive identification and information resource for over 1000 invasive plants. Centre for Biological Information Technology, The University of Queensland.