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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 Conservation listings displayed on Florabase may also be out of date.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.

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.