Characters: Colonies consist of fused, flattened basal branches, forming extensive horizontal plates commonly over 2 metres across. The oldest parts of colonies are frequently fused into a solid plate. Corallites are widely spaced and mostly immersed, becoming nariform and sharp edged towards branch tips.
Colour: Brown or green with pale margins.
Similar Species: Acropora solitaryensis which has greater fusion of branches and less distinctive axial corallites.
Habitat: Reef slopes.
Abundance: Common at the Houtman Abrolhos Islands, south-western Australia, uncommon elsewhere.