Spotted rock

Crust lichens like the bull's eye lichen are common on exposed rock. Usually, around here, they present one or a few large round pale green and orange patches, characteristically rough and leafy, usually growing up to about 6 inches across. This lichen is different: the patches are small, about three inches across or less, smooth, and scattered all over the rock. They look blue to me. I couldn't identify it.

Spotty rock

Typical bull's eye lichen. 2018

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Los líquenes que crecen en las piedras expuestas al aire por aquí son comunmente los "bull's-eye" (literalmente "ojo de buey", Placopsis sp.). Son líquenes apegadas a la piedra, pero con "hojas" en la parte superior, normalmente de un verde claro con puntos cafés o anaranjados.

Encontré esta piedra con muchos circulitos de liquen, pequeños, más o menos lisos, muchos de un color azul pálido. No los pude identificar.