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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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Acrochaetium humile (Rosenv.) Børgesen

Reference
Dansk Bot.Ark. 3:23 (1915)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus to 160 µm tall exclusive of hairs, arising from a prostrate base. Erect axes slightly arcuate, secundly branched; cells 9–16 µm long and 4–7 µm diam. Most filaments terminating in an elongate hair 80–90 µm long borne centrally or slightly laterally. Intercalary cells also often with lateral hairs. Each cell with a stellate plastid and a central pyrenoid 3–4 µm diam.

Reproduction. Monosporangia secund, sessile or pedicellate, ellipsoidal, c. 16 × 7–9 µm.

Distribution. This species is seemingly widespread, but most records are from predominantly temperate or cooler regions.

Habitat. Epizoic in the shallow subtidal in Western Australia.

[After J.M. Huisman & W.J. Woelkerling in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 20 (2018)]