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.
Similar species: Acropora rudis, which has larger branches and larger corallites, with radial corallites restricted to the upper side of branches. See also A. parahemprichii and A. variolosa.
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