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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. 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.

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Dictyomenia angusta J.Agardh

Reference
Acta Univ.Lund. 60-61 (1897)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus dark brown-red, erect, 10–25 cm high, complanately and irregularly branched with indeterminate branches 1–2 mm broad and separated by 3 to many determinate laterals on each side. Determinate laterals 2–3(–5) mm long, slender, usually with 2–3 apical branches, 2–5 mm apart on each side of indeterminate branches, denuded near the thallus base. Holdfast probably fibrous (inadequately seen). Structure. Apical structure not observed. Axial cells moderately conspicuous, branching to the determinate laterals every 3–4 cells. Indeterminate branches with 6 pericentral cells, corticated from near the apices; indeterminate laterals corticated. Trichoblasts not observed.

Reproduction.Only tetrasporangial branch clusters seen, situated on the surface over lateral veins of determinate laterals, much branched; tetrasporangia immature.

Distribution. Port Elliot, S. Aust., and Walkerville, Vic. J. Agardh placed similar specimens from Geographe Bay, W. Aust., under this species.

[After Womersley, Mar. Benthic Fl. Southern Australia IIID: 345–347 (2003)]