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This is a crustose species with a thick, ochre-grey, scurfy, C+ orange thallus and occasional brown-black discs with a wavy edge. It grows on siliceous rock by the sea. L. asema with more rounded discs is similar, but has a granular, more coherent, thallus. L. meiococca is entirely scurfy, fading in colour to grey in shaded conditions. In Ireland, it occurs mainly along the north and west coasts.
Original text submitted by Vince J. Giavarini