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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not reflected in Florabase, herbarium collections, or in the census. We are hoping to be able to reinstate services around December 15; we will provide an update at that time.

The notice period started at 9:00 am on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Monday, 15 December 2025 +08:00.

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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)]