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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.

Avrainvillea amadelpha (Mont.) A.Gepp & E.Gepp

Reference
Trans.Linn.Soc.London,Bot. 7:178-179, Pl. 23-24, Figs 20-22 (1908)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus forming clusters of erect stipitate fronds from an emergent holdfast, olive to green, to 7 cm tall. Stipes to 13 mm long, 1–2 mm wide, mostly unbranched, each bearing a thin spongy mostly cuneate and non-zonate blade 25–30 mm tall and up to 25 mm wide, composed of tightly woven siphons. Internal siphons cylindrical, 17–25 μm diam., sparingly dichotomously branched with shallow elongate constrictions at the dichotomies, tapering to 12–15 μm diam. towards the surface and becoming torulose, forming a pseudocortex; apices rounded. Siphons with numerous subspherical to lenticular plastids 3–5 μm diam., each with a prominent pyrenoid.

Distribution. Tropical Indo-Pacific.

Habitat. Epilithic in the intertidal and shallow subtidal.

[After Huisman, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 118-120 (2015)]

John Huisman and Cheryl Parker, 3 August 2021

Distribution

IMCRA Regions
North West Shelf.
Local Government Areas (LGAs)
Broome, Derby-West Kimberley.