Colonies are plate-like, with robust horizontal flat radiating branches. Branches may be highly fused towards the colony centre or may form tiers of dissected plates. Axial corallites are distinctive and commonly form rows along colony margins. Radial corallites are commonly of two sizes, the larger being tubular, the smaller being pocket-shaped and at the base of larger corallites.
Grey-brown with white margins.
Shallow reef environments, especially where exposed to strong currents.