Stoloniferous, basally decumbent perennial, grass-like or herb, 0.25-1.25 m high. Fl. green, Apr to Jul. Sandstone.
Beard’s Provinces: Northern Province, South-West Province.
IBRA Regions: Central Kimberley, Dampierland, Ord Victoria Plain, Swan Coastal Plain, Victoria Bonaparte.
IBRA Subregions: Dandaragan Plateau, Hart, Ord, Ord-Victoria Plains P1, Perth, Pindanland, Victoria Bonaparte P1.
Local Government Areas (LGAs): Broome, Cocos Islands, Gingin, Halls Creek, Wanneroo, Wyndham-East Kimberley.
Alternative Names. Mauritius grass, giant couch, California grass, scotch grass.
General Biology. Growth form. Grass. Life form. Perennial, stoloniferous. Reproduction. Stolons, irregular seeder. Dispersal. Wind, water. Photosynthetic Pathway. C4. Fire response. Resprouts.
Notes. Has been widely promoted throughout northern Australia for pasture, however is a serious weed that threatens large areas of wetland from northern New South Wales to Western Australia. Destroys waterbird breeding habitats and displaces native vegetation. Increases fire intensities, fuel loads and flame heights, resulting in damage to fire-sensitive woody vegetation. Frost sensitive in temperate areas. Adapted to a wide range of soil types, from sandy to clay soils of moderate to good fertility. Tolerates moderate salinity, low pH and high levels of trace elements normally produced under water-logged conditions. Tolerates flooding, with the depth of water tolerance related to water temperature. Develops adventitious rootlets under flooded conditions. Moderately tolerant of shade but prefers full sun. Little or no flowering is reported at subtropical latitudes. Reproduction is mainly vegetative, however it will flower and produce seed in humid, low altitude environments.
Additional information. Origin. Africa. History of use/introduction. Pasture, erosion control.
Suggested method of management and control. Spray with 2% 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.
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/