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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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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)]