Characters: Colonies are usually less than 0.3 metres across and hemispherical or flattened. Valleys are contorted but mostly extend from the colony centre towards the periphery. Walls are short, sometimes with short spires. Columellae are weakly developed. Septa are smooth or have small teeth.
Colour: Green and grey with valleys and walls commonly of contrasting colours.
Similar species: Pectinia lactuca, which has larger, less contorted valleys.
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