Characters: Colonies are tables, usually side-attached, with generally horizontal radiating anastomosing branches which may form an almost solid plate. There is usually no development of vertical branchlets. Radial corallites are immersed to tubular, with nariform openings.
Colour: Brown, grey or green, often with pale margins.
Habitat: Upper reef slopes, back reef margins and fringing reefs.
Taxonomic Note: A species complex.
Identification Guides: Veron (1986a); Sheppard and Sheppard (1991); Nishihira and Veron (1995); Carpenter, Harrison, Hodgson et al. (1997); Pillay, Terashima, Venkatasami et al. (2002); Turak and DeVantier (2011b);