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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 project team is now conducting testing of the migrated data, and a further update will be provided by the end of the financial year (1 July). 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 Wednesday, 1 July 2026 +08:00.

Siphonocladus tropicus (P.Crouan & H.Crouan) J.Agardh

Reference
Algern.Syst. 105 (1887)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus upright, to 4–5 cm high, attached by non-septate rhizoids, with numerous erect cylindrical axes arising from the base. Axes to 3mm in diameter, with basal annular constrictions. Lateral branches formed from protoplasts of parent branch, these rounding-up and then forming irregularly radial protrusions along the parent branch that grow to 1–2 cm in length. All branches with rounded apices.

Distribution. Tropical waters generally. In W. Aust. south to Rottnest I.

Habitat. Epilithic in the subtidal.

John Huisman & Cheryl Parker, 3 August 2021

Distribution

IBRA Regions
Pilbara.
IBRA Subregions
Roebourne.
IMCRA Regions
Abrolhos Islands, Central West Coast, Leeuwin-Naturaliste, Ningaloo, Pilbara (nearshore), Pilbara (offshore).
Local Government Areas (LGAs)
Ashburton, Cockburn, Dandaragan, Exmouth, Greater Geraldton, Karratha.