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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. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

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Ulva flexuosa Wulfen

Reference
Crypt.Aquat. 1 (1803)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus medium green, erect but flaccid, proliferous from near the base, 3–6 cm high and 2–8 mm broad. Cells in longitudinal rows throughout most of the thallus and in many parts also in transverse rows, angular and square to rectangular, (10–)14–18 µm long and 8–12 µm broad; chloroplast parietal, usually with 2–3 pyrenoids per cell.

Reproduction. Generations isomorphic; gametophytes dioecious and anisogamous, with apomictic development of gametes.

Distribution. Cosmopolitan?

[After Womersley, Mar. Benthic Fl. Southern Australia I: 157 (1984), as Enteromorpha flexuosa]

John Huisman & Cheryl Parker, 3 August 2021

Distribution

IBRA Regions
Carnarvon, Dampierland, Swan Coastal Plain.
IBRA Subregions
Perth, Pindanland, Wooramel.
IMCRA Regions
Kimberley, Leeuwin-Naturaliste, Pilbara (offshore).
Local Government Areas (LGAs)
Ashburton, Broome, Fremantle, Joondalup, Karratha, Perth, Shark Bay, South Perth, Wyndham-East Kimberley.