Decumbent, tufted annual, grass-like or herb, 0.15-1 m high. Fl. green-purple, Dec or Jan to May. Sand, loam, alluvium.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Jarrah Forest, Mallee, Swan Coastal Plain, Warren.
IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Northern Jarrah Forest, Perth, Southern Jarrah Forest, Warren, Western Mallee.
IMCRA Regions: WA South Coast.
Local Government Areas (LGAs): Albany, Augusta Margaret River, Bayswater, Boddington, Capel, Claremont, Corrigin, Cunderdin, Denmark, Joondalup, Kalamunda, Kent, Kulin, Mandurah, Manjimup, South Perth, Swan, Victoria Plains.
Alternative Names. Summer grass, hairy crabgrass.
General Biology. Growth form. Grass. Life form. Annual, caespitose. Reproduction. Seed. Dispersal. Mowing, movement of seed in hay. Photosynthetic Pathway. C4.
Notes. Commonly found in lawns, gardens and disturbed areas. Has association with nitrogen-fixing bacteria. A fungal pathogen has reduced the fecundity of this species in some areas and is a potential candidate for a biocontrol agent. Can release growth inhibitors in root exudates that retards germination and growth of other species. Has recorded herbicide resistance.
Additional information. Origin. North Africa, temperate Asia, tropical Asia, Europe. History of use/introduction. Animal fodder. Similar exotic species. Digitaria ciliaris.
Suggested method of management and control. Small infestations and individual plants can be hand removed by releasing the roots with a knife or trowel, ensure sprawling stems are also removed. Otherwise spray 1% glyphosate in spring. 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.
Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/