Thallus yellow-grey or bluish-grey, often glossy. Narrow, overlapping lobes to 3mm wide and much divided. Underside black with short rhizines. Variable covering of coralloid isidia, often abundant. Occasionally fertile producing brown-disced apothecia with thin, contorted margins.
Acid rocks, walls and roofs in exposed areas.
Common. With a Western distribution.
Frequent. Mostly confined to Charnwood Forest.
Leicestershire & Rutland Map
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