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The huge, yellowish, grey-green, rounded scales or squamules (to 1cm diam.) will be among the first characteristics of this lichen to attract attention on the decaying wood of fallen or rotting trees. The lower surface of the squamule is entirely floury sorediate and orange pigmented toward its point of attachment. Both the discs and smaller, spore-manufacturing structures called pycnidia which may appear only as dots on the surface, are red. Reactions K+ yellow, PD+ orange. Northern and southern Ireland.
Original text submitted by Vince J. Giavarini