Colonies are digitate, corymbose or prostrate, with curved branches which only slightly taper. Colonies may be over one metre across. Axial corallites are dome-shaped and more than twice the size of radial corallites. Radial corallites are of two sizes, thick walled, tubular, and only slightly increase in size down branches. Incipient axial corallites and branchlets develop towards the base of branches.
Usually purple, blue (which may photograph pink) or cream.