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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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Centaurea calcitrapa L.
Star Thistle

Reference
Sp.Pl. [Linnaeus] 2:917 (1753)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status
Current

Erect, divaricately branched annual, herb, to 1 m high. Fl. purple-pink, Oct to Nov. Weed of pastures & waste grounds.

Amanda Spooner, Descriptive Catalogue, 3 September 1999
Image

Distribution

IBRA Regions
Avon Wheatbelt, Coolgardie, Esperance Plains, Nullarbor, Swan Coastal Plain.
IBRA Subregions
Mardabilla, Merredin, Nullarbor Plain, Perth, Recherche.
IMCRA Regions
Leeuwin-Naturaliste.
Local Government Areas (LGAs)
Cockburn, Dundas, Esperance, Fremantle, Merredin, Westonia.