Prostrate annual, herb, 0.03-0.2 m high. Fl. pink, Aug to Dec. Brownsandy or clay loam, laterite gravel, granite. Winter-wet flats, breakaways, disturbed shrublands, roadverges, gardens.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain, Warren.
IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Fitzgerald, Geraldton Hills, Lesueur Sandplain, Northern Jarrah Forest, Perth, Recherche, Southern Jarrah Forest, Warren, Western Mallee.
IMCRA Regions: WA South Coast.
Local Government Areas (LGAs): Albany, Brookton, Busselton, Chapman Valley, Coorow, Corrigin, Dalwallinu, Dumbleyung, Esperance, Gosnells, Harvey, Jerramungup, Kondinin, Koorda, Lake Grace, Merredin, Murray, Narrogin, Nedlands, Northampton, Perenjori, Perth, Plantagenet, South Perth, Stirling, Subiaco, Swan, Toodyay, Wongan-Ballidu.
Alternative Names. Ball Clover, Bush Clover, Flat headed Clover, McNeill Clover, Native Trefoil, Round head Clover, Smooth head Trefoil.
General Biology. Growth form. Herb. Life form. Annual. Reproduction. Seed. Dispersal. Livestock (ingestion), ants, agricultural activities.
Notes. Has low germination rates in unsuitable environmental conditions. Capable of nitrogen fixation. Trifolium species with high rates of nitrogen fixation may influence the abundance and growth of other plants species. Relatively drought tolerant. Sets large amounts of seed, even under grazing, with a high proportion of dormant hard seed. Prefers neutral to acid soils in low lying areas and drainage lines. Considered to be waterlogging intolerant. High percentage of seed survives ingestion by sheep.
Additional information. History of use/introduction. Forage. Similar exotic species. Trifolium species.
Suggested method of management and control. Prevent seed set for 5 years. Hand pull isolated plants in winter before flowering. Spot spray with 1% glyphosate before flowering. Otherwise spot spray with 4 g Lontrel®750, 1 g Logran®, 0.1 g metsulfuron methyl (600 g/L) or 0.1 g Glean® in 10 L water + wetting agent when plants are actively growing. Repeat annually for several years. 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/