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Service Notice

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. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Monday, 2 March 2026 +08:00.

Acrochaetium microscopicum (Kütz.) Nägeli

Reference
Pfl.-Physiol.Unters. 2:532 (1858)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus epiphytic, 30–125 µm tall exclusive of hairs; original spore persisting as a unicellular base. Erect filaments 20–100 µm long, commonly curved, simple or with a few secund or irregular laterals; cells barrel-shaped to cylindrical, 3–10 µm long, 3–7 µm diam., smaller near the apices [L:B 0.7–2]. Plastids parietal, laminate to axial and stellate. Terminal and pseudolateral hairs to 100 µm long.

Reproduction. Monosporangia ovoid, 5–10 µm long, 4–7 µm diam., terminal or lateral, solitary, rarely in pairs, sessile or stalked, adaxially seriate or scattered. Other reproductive structures unknown in Australian collections.

Distribution. Almost cosmopolitan.

Habitat. Epiphytic on a wide variety of algae.

[After J.M. Huisman & W.J. Woelkerling in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 22 (2018)]

John Huisman & Olga Nazarova, 3 August 2021

Distribution

IBRA Regions
Warren.
IBRA Subregions
Warren.
Local Government Areas (LGAs)
Manjimup.