White crustose lichen with isidia

White crustose lichen with isidia

Observation - White crustose lichen with isidia. Description: White crustose lichen, thallus about 25 cm diameter, growing on granite. Thallus covered with densely packed coralloid isidia. Bulges in the thallus are also covered with the isidia. Possibly Pertusaria corallina.

White crustose lichen, thallus about 25 cm diameter, growing on granite. Thallus covered with densely packed coralloid isidia. Bulges in the thallus are also covered with the isidia. Possibly Pertusaria corallina.