Characters: Colonies consist of open thickets of sturdy prostrate to upright branches. They are frequently over 2 metres across and may form extensive single species stands. Axial corallites are dome-shaped and incipient axial corallites are common. Radial corallites are large and conical. They are irregularly spaced and have thick smooth walls. The coenosteum is smooth.
Colour: Commonly brown or pinkish brown.
Habitat: Shallow reef environments.