Colonies are prostrate and up to 2 metres across. Branches are mostly contorted and irregularly fused except towards the periphery of large colonies where they are relatively well defined and have upturned ends. Branches from the central and peripheral parts of the same colony have dissimilar shapes. Axial corallites are only distinguishable on well defined peripheral branches. Elsewhere axial, incipient axial and radial corallites are a confusion of different shapes and sizes and face different directions. The coenosteum is coarse.
Upper reef slopes exposed to strong wave action.