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 Conservation listings displayed on Florabase may also be out of date.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

Caulerpa macrodisca Decne.

Reference
Ann.Sci.Nat., Bot. sér. 2, 17:336 (1842)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus forming clumps, spreading laterally to 12 cm, medium to dark green, with smooth stolons c. 2 mm diam., attached by pillars and sparse rhizoidal filaments. Assimilators to 5 cm tall, with a terete rachis 1.0–1.5 mm diam. Ramuli sparse or crowded, distinctly peltate, with a terete stalk to 5 mm long and a terminal disc 4–10 mm wide.

Distribution. Known from the tropical and subtropical regions of the western Pacific and eastern Indian Oceans. In W.A. south to Coral Bay.

Habitat. Epilithic in the subtidal.

[After Belton, Huisman & Gurgel, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 92 (2015)]

John Huisman and Cheryl Parker, 3 August 2021

Distribution

IBRA Regions
Dampierland, Geraldton Sandplains.
IBRA Subregions
Geraldton Hills, Pindanland.
IMCRA Regions
Abrolhos Islands, Canning, Kimberley, Ningaloo.
Local Government Areas (LGAs)
Broome, Carnarvon, Exmouth, Greater Geraldton, Wyndham-East Kimberley.