Erect or prostrate annual, herb, 0.04-0.3 m high. Fl. yellow/green-yellow, Aug to Dec. Peaty sand. Winter-wet situations, swamps or in running water.
Beard’s Provinces: South-West Province.
IBRA Regions: Jarrah Forest, Swan Coastal Plain, Warren.
IBRA Subregions: Northern Jarrah Forest, Perth, Southern Jarrah Forest, Warren.
IMCRA Regions: Leeuwin-Naturaliste, WA South Coast.
Local Government Areas (LGAs): Albany, Augusta-Margaret River, Bayswater, Bridgetown-Greenbushes, Busselton, Canning, Chittering, Dardanup, Gingin, Gosnells, Harvey, Manjimup, Mundaring, Murray, Nannup, Nedlands, Perth, Plantagenet, Serpentine-Jarrahdale, Swan, Wanneroo, Waroona.
Alternative Names. Rough-fruit Buttercup.
General Biology. Growth form. Herb. Life form. Annual. Reproduction. Seed. Toxicity. All fresh plant parts are poisonous.
Notes. Flowers are hermaphrodite (have both male and female parts) and are pollinated by flies. Has allelopathic properties, inhibiting growth of nearby plant species. Simazine resistant biotypes are recorded from Spain.
Additional information. Origin. Macaronesia, northern Africa, Asia, Europe.
Suggested method of management and control. Hand remove small/isolated infestions. 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/