Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not reflected in Florabase, herbarium collections, or in the census. We are hoping to be able to reinstate services around December 15; we will provide an update at that time.

The notice period started at 9:00 am on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Monday, 15 December 2025 +08:00.

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Thalassodendron pachyrhizum Hartog

Reference: Verh.Kon.Akad.Wetensch., Afd.Natuurk. Sect. 2 59:194 (1970)
Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Dioecious rhizomatous, submerged, marine perennial, herb, with short erect stems. Fl. green, Jul. Sandy or rocky substrates. Limestone reefs.

Distribution

IBRA Regions: Esperance Plains, Geraldton Sandplains, Swan Coastal Plain, Warren.
IBRA Subregions: Fitzgerald, Geraldton Hills, Perth, Warren.
IMCRA Regions: Abrolhos Islands, Central West Coast, Leeuwin-Naturaliste, WA South Coast.
Local Government Areas (LGAs): Augusta Margaret River, Cockburn, Cottesloe, Dandaragan, Esperance, Greater Geraldton, Irwin, Jerramungup, Northampton, Ravensthorpe.