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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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Tribulus occidentalis R.Br.
Perennial Caltrop

Reference
Sturt, Narr.Exped.Cent.Austral. 2, App.:69 (1849)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Prostrate perennial, herb, 0.02-0.1 m high, plants villous; leaflet pairs 7-10; fruits with many spines, spines 4-6(-8) mm long. Fl. yellow, Feb to Nov. Sandy soils. Coastal areas.

Helen Coleman, Descriptive Catalogue, 12 November 1998
Image

Distribution

IBRA Regions
Carnarvon, Central Ranges, Dampierland, Gascoyne, Gibson Desert, Great Sandy Desert, Great Victoria Desert, Little Sandy Desert, Murchison, Ord Victoria Plain, Pilbara, Tanami, Yalgoo.
IBRA Subregions
Ashburton, Augustus, Cape Range, Central, Chichester, Eastern Murchison, Edel, Fitzroy Trough, Fortescue, Hamersley, Lateritic Plain, Mackay, Mann-Musgrave Block, Pindanland, Roebourne, South Kimberley Interzone, Trainor, Western Murchison, Wooramel.
IMCRA Regions
Canning, Eighty Mile Beach, North West Shelf, Pilbara (nearshore), Pilbara (offshore), Shark Bay, Zuytdorp.
Local Government Areas (LGAs)
Ashburton, Broome, Carnarvon, Derby-West Kimberley, East Pilbara, Exmouth, Karratha, Laverton, Ngaanyatjarraku, Port Hedland, Sandstone, Shark Bay, Upper Gascoyne, Wiluna, Wyndham-East Kimberley, Yalgoo.