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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. 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.

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Polysiphonia pentamera Hollenb.

Reference
Pacific Sci. 22:204-205, Fig. 2D (1968)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus with well-developed prostrate axes 120–150 µm diam. [segment L:B 0.6–0.7], attached by unicellular rhizoids pit-connected to the bearing cell. Upright axes to 7 mm tall, sparsely branched (origin of lateral branches not observed), 100–150 µm diam. [segment L:B 0.1–1.5] at mid-thallus, markedly less near apices [segment L:B c. 0.3]. All axes with 5 pericentral cells. Trichoblasts/scar cells rarely present.

Reproduction. Reproductive structures not observed.

Distribution. Known from warmer waters of the eastern Indian and central and western Pacific Oceans. In Australia known only from the Dampier Archipelago.

Habitat. epilithic in the subtidal.

[After J.M. Huisman in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 569 (2018)]