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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. The Herbarium team, working with the Biodiversity Information Office, now have the Nomos-hosted WACensus in production, and we will begin to update the flora and fungi for WA within the system soon. The Specify project team continues to test and streamline the new collections management system, and we expect this to be online in October. 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 Thursday, 1 October 2026 +08:00.

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Hypericum japonicum Thunb.
Matted St John's Wort

Reference
Fl.Jap. 295 Tab.31 (1784)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Ascending annual, herb, 0.02-0.12 m high. Fl. yellow, Oct to Nov. Moist places: pool edges, ephemeral swamps, creek beds.

Grazyna Paczkowska, Descriptive Catalogue, 15 October 1996
Image

Distribution

IBRA Regions
Carnarvon, Central Ranges, Coolgardie, Geraldton Sandplains, Jarrah Forest, Little Sandy Desert, Murchison, Swan Coastal Plain, Warren.
IBRA Subregions
Eastern Murchison, Geraldton Hills, Lesueur Sandplain, Mann-Musgrave Block, Mardabilla, Northern Jarrah Forest, Perth, Trainor, Warren, Wooramel.
Local Government Areas (LGAs)
Busselton, Esperance, Harvey, Irwin, Manjimup, Ngaanyatjarraku, Northampton, Sandstone, Serpentine-Jarrahdale, Toodyay, Upper Gascoyne, Victoria Plains, West Arthur, Wiluna.