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 Conservation listings displayed on Florabase may also be out of date.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

Dudresnaya hawaiiensis R.K.S.Lee

Reference
Amer.J.Bot. 50:315-319, Figs 1-12 (1963)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus 4–6 cm tall, light pink, arising from a discoid holdfast, irregularly and profusely branched; individual axes hirsute. Primary axial cells 25–75 µm diam. [L:B c. 4], without a crystalline inclusion, each cell often bearing medially to distally 1 major branch and 2 or 3 carpogonial filaments, also terminally and laterally on cortical filaments.

Reproduction. Carpogonial branches 8–11 cells long, with the terminal 1 or 2 cells recurved. Auxiliary cell branches 13–17 (or more) cells long, continuing growth following diploidisation of the auxiliary cell; auxiliary cell the fifth or sixth cell from the base, with prominently modified cells proximal and distal to it. Mature gonimoblast spherical, 150–180 µm diam., with angular carposporangia 10–12 µm diam. w

Distribution. Widespread in warmer waters of the central and western Pacific Ocean; also in South Africa.

Habitat. Epilithic in the subtidal in north-western Australia, but also reported to be epiphytic or epizoic elsewhere in its range.

[After J.M. Huisman in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 176–178 (2018)]

John Huisman & Olga Nazarova, 3 August 2021

Distribution

IMCRA Regions
Pilbara (nearshore).
Local Government Areas (LGAs)
Karratha.