Characters: Colonies are thin, often overlapping laminae, with lobed margins. Corallites are irregularly distributed with deep seated columellae and thick, granulated septo-costae. Colour: Green, brown or red-brown, with white perimeters. Similar species: Psammocora explanulata, which has smaller corallites and petaloid septo-costae. See also the agariciid Leptoseris scabra. Habitat: Usually found encrusting vertical or overhung faces. Abundance: Uncommon