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Service Notice

The Western Australian Herbarium’s collections management system and census were set to read-only mode on 1 October 2025. Taxonomic updates published since this time are not being reflected in Florabase, herbarium collections, or Western Australia’s taxonomic names census (Nomos). Conservation listings displayed on Florabase may also be out of date. Please refer to DBCA’s Threatened species and communities webpage for the most recent Threatened and Priority Flora List, noting that recent taxonomic updates are similarly not included. Our database migration is moving to a staging phase. We thank you for your patience as we ensure the integrity of our biodiversity data, develop new workflows, and train staff to use the new systems. Please reach out to us if you have any questions or concerns.

The notice period started at 12:00 pm on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Friday, 1 January 2027 +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.