Stock Photo - Umbilicaria pustulata or Lasallia pustulata is a foliose lichen that grows on siliceous rocks. This photo was taken in Arribes del Duero Natural Park, Zamora province, Castilla-Leon, Spain.

Stock Photo: Umbilicaria pustulata or Lasallia pustulata is a foliose lichen that grows on siliceous rocks. This photo was taken in Arribes del Duero Natural Park.

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