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 Conservation listings displayed on Florabase may also be out of date.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

Reference: Univ.Calif.Publ.Bot. 13:107 (1925)
Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Scientific Description

Habit and structure. Thallus medium to dark olive green, to 3.5 cm tall, with several loosely organized complanate blades with ragged margins. Blades reticulate, formed by much-branched, anastomosing filaments, these 190–250 µm in diameter, 485–630 µm long and bearing up to 5 branches per node. Adhesion of filaments to target filaments by digitate processes. Cells with a reticulum of plastids, with numerous spherical pyrenoids 2–3 µm in diameter.

Distribution. Widespread in tropical waters of the Indo-Pacific.

Habitat. Epilithic.

Distribution

IBRA Regions: Swan Coastal Plain.
IBRA Subregions: Perth.
Local Government Areas (LGAs): Cockburn.