Colonies usually have tall open branches which do not fuse. Upright branches have many nearly perpendicular sub-branches which have a third and sometimes a fourth generation of smaller branches. The size of sub-branches decreases in sequence from the base to the tips of main branches. Axial corallites are large and dome-shaped. Radial corallites are mostly immersed on lower branches, becoming uniform and tubular on upper branches.
Brown or cream, sometimes with yellowish radial corallites.