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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not reflected in Florabase, herbarium collections, or in the census. We are hoping to be able to reinstate services around December 15; we will provide an update at that time.

The notice period started at 9:00 am on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Monday, 15 December 2025 +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.