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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Monday, 2 March 2026 +08:00.

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Posidonia australis Hook.f.
Fibreball Weed

Reference
Bot.Antarct.Voy.III.(Fl.Tasman.) 2:43 (1858)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Rhizomatous, submerged, meadow forming perennial, herb, leaves 11-20 mm wide. White sand. At 1-15 m deep.

Grazyna Paczkowska, Descriptive Catalogue, 9 August 1994
Image

Distribution

IBRA Regions
Carnarvon, Esperance Plains, Jarrah Forest, Swan Coastal Plain.
IBRA Subregions
Fitzgerald, Perth, Recherche, Southern Jarrah Forest, Wooramel.
IMCRA Regions
Abrolhos Islands, Central West Coast, Eucla, Leeuwin-Naturaliste, Shark Bay, WA South Coast.
Local Government Areas (LGAs)
Albany, Busselton, Carnarvon, Claremont, Cockburn, Cottesloe, Dandaragan, Esperance, Greater Geraldton, Jerramungup, Rockingham, Shark Bay.