Dioecious rhizomatous, submerged, viviparous, marine perennial, herb, to 0.6 m high. Fl. green, Oct to Dec or Jan to Mar. Limestone. Reefs.
Beard’s Provinces: South-West Province.
IBRA Regions: Geraldton Sandplains, Mallee, Swan Coastal Plain.
IBRA Subregions: Eastern Mallee, Geraldton Hills, Perth.
IMCRA Regions: Abrolhos Islands, Central West Coast, Eucla, Eyre, Leeuwin-Naturaliste, Murat, WA South Coast.
Local Government Areas (LGAs): Albany, Augusta-Margaret River, Busselton, Cockburn, Cottesloe, Esperance, Greater Geraldton, Irwin, Jerramungup, Joondalup, Northampton, Ravensthorpe, Rockingham.