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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. The Herbarium team, working with the Biodiversity Information Office, now have the Nomos-hosted WACensus in production, and we will begin to update the flora and fungi for WA within the system soon. The Specify project team continues to test and streamline the new collections management system, and we expect this to be online in October. 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 Thursday, 1 October 2026 +08:00.

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Avrainvillea nigricans Decne.

Reference
Ann.Sci.Nat., Bot. ser. 2, 18:108 (1842)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus erect, c. 5.5 cm tall, dark olive-green, solitary. Stipe terete, c. 3.6 cm long and 6 mm diam., bearing a flattened subcircular spongy blade. Structure of blade multistratose, with interwoven siphons 25–55 µm diam., irregularly dichotomously branched, with shallow constrictions at the dichotomies; mid-thallus and distal siphons moniliform. Plastids spherical, 3–4 µm diam., each with a pyrenoid.

Distribution. Widespread in tropical seas.

Habitat. Known from sandy substrata in the subtidal.

[After Huisman, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 121 (2015)]

John Huisman and Cheryl Parker, 3 August 2021

Distribution

IMCRA Regions
Pilbara (offshore).
Local Government Areas (LGAs)
Ashburton.