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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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Holcus setiger Nees
Annual Fog

Reference
Linnaea 7:278-280 (1832)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status
Current

Erect slender annual, grass-like or herb, 1 m high. Fl. green, Oct to Nov. Sandy soils. Swamps.

Grazyna Paczkowska, Descriptive Catalogue, 19 November 1993

Distribution

IBRA Regions
Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain.
IBRA Subregions
Katanning, Northern Jarrah Forest, Perth, Southern Jarrah Forest.
IMCRA Regions
Leeuwin-Naturaliste.
Local Government Areas (LGAs)
Armadale, Augusta Margaret River, Boyup Brook, Busselton, Harvey, Kalamunda, Kojonup, Kwinana, Manjimup, Mundaring, Murray, Plantagenet, Rockingham, Swan, Wagin, Wanneroo, Waroona, West Arthur.

Management Notes (for the Swan NRM Region)

General Biology. Growth form. Grass. Life form. Annual, caespitose. Reproduction. Seed. Dispersal. Mammals. Photosynthetic Pathway. C3.

Notes. Has staggered germination.

Additional information. Origin. South Africa. Similar exotic species. Holcus mollis.

Suggested method of management and control. Remove isolated plants before they set seed. Spray glyphosate 0.5%. 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
Active Growth       O Y Y Y Y Y Y Y    
Flowering                 Y Y Y    
Fruiting                   U U U  
Optimum Treatment           U U U U U U    

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.
  • 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.
  • Moore, C.B. & Moore, J.H. (2002) Herbiguide, the pesticide expert on a disk. Herbiguide, PO Box 44 Albany, Western Australia, 6330.