Dioecious rhizomatous, submerged, viviparous, marine perennial, herb, to 0.8 m high. Fl. green, Sep to Dec or Jan to Feb. Limestone. Reefs.
Beard’s Provinces: Eremaean Province, South-West Province.
IBRA Regions: Carnarvon, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain, Yalgoo.
IBRA Subregions: Edel, Fitzgerald, Geraldton Hills, Perth, Recherche, Southern Jarrah Forest, Wooramel.
IMCRA Regions: Abrolhos Islands, Central West Coast, Eucla, Eyre, Leeuwin-Naturaliste, Murat, Shark Bay, Spencer Gulf, St Vincent Gulf, Victorian Embayments, WA South Coast, Zuytdorp.
Local Government Areas (LGAs): Albany, Augusta-Margaret River, Bunbury, Busselton, Carnarvon, Cockburn, Cottesloe, Dandaragan, Dundas, Esperance, Greater Geraldton, Irwin, Jerramungup, Northampton, Ravensthorpe, Rockingham, Shark Bay.