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 Conservation listings displayed on Florabase may also be out of date.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

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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)]