Decumbent, woolly perennial, herb, to 0.3 m high, leaves ovate, grey, fleshy. Fl. yellow, Jun to Dec or Jan. White sand. Coastal foredunes.
Beard’s Provinces: Eremaean Province, South-West Province.
IBRA Regions: Esperance Plains, Geraldton Sandplains, Hampton, Jarrah Forest, Mallee, Swan Coastal Plain, Warren.
IBRA Subregions: Fitzgerald, Geraldton Hills, Hampton, Perth, Recherche, Southern Jarrah Forest, Warren, Western Mallee.
IMCRA Regions: Central West Coast, Eucla, Leeuwin-Naturaliste, WA South Coast.
Local Government Areas (LGAs): Albany, Augusta-Margaret River, Bunbury, Dandaragan, Denmark, Dundas, Esperance, Greater Geraldton, Jerramungup, Mandurah, Manjimup, Plantagenet, Ravensthorpe, Wanneroo.
Alternative Names. Beach Pumpkin, Seepampoen.
General Biology. Growth form. Herb. Life form. Perennial. Reproduction. Seed. Dispersal. Wind, soil, garden waste. Seedbank persistence. Short-medium term.
Notes. Rapidly growing pioneer species that prefers newly exposed margins of coastal dunes. May increase biomass on coastal dunes, threaten native plant diversity and shorebird nesting habitats and alter coastal processes. Has a leaf hair-layer important for reducing transmitted UV and transpiration rates. Pollinated by a range of bees and flies. Seeds are non-dormant, generally wind-dispersed, can remain viable in salt or fresh water and be dispersed by ocean currents.
Additional information. Origin. South Africa. Similar exotic species. Arctotheca calendula.
Suggested method of management and control. Difficult to hand pull and resistant to chemicals. Try Lontrel® 10 ml/10 L (500 ml/ha) + Pulse® in early growth stages, otherwise glyphosate 1% will provide control at all growth stages. 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/