Skip to main content

Service Notice

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 Conservation listings displayed on Florabase may also be out of date.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

The notice period started at 12:00 pm on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Friday, 1 January 2027 +08:00.

Chaetomorpha valida (Hook.f. & Harv.) Kütz.

Reference
Sp.Alg. 379 (1849)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus dark green, loose-lying and forming entangled masses to 15 cm across and 1–5 cm thick, of curved, often crisped, rigid filaments, in the uppermost sublittoral of sheltered habitats. Filaments without attachment cells and of similar diameter throughout. Cells (300–)350–400 µm in diameter and L/B (1.5–)2–3(–4), not or slightly incised at the cross walls; lateral walls 30–60 µm thick, cross walls 8–15 µm thick; chloroplasts densely reticulate to discoid and closely aggregated, with numerous pyrenoids; nuclei numerous.

Reproduction.Unknown.

Distribution.From Venus Bay, S. Aust., to Port Phillip, Vic., and Port Arthur, Tas.

Habitat. C. valida usually grows on tidal flats in sheltered localities.

[after Womersley, Mar. Benthic Fl. Southern Australia I: 178 (1984)]

John Huisman & Cheryl Parker, 3 August 2021

Distribution

IBRA Regions
Warren.
IBRA Subregions
Warren.
IMCRA Regions
Leeuwin-Naturaliste.
Local Government Areas (LGAs)
Augusta Margaret River.