Platismatia glauca is a common and widespread species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. This distinctive lichen forms pale to dull grey patches measuring 1–15 centimetres across, with wavy, irregularly indented lobes that often have reproductive structures (apothecia) along their upturned margins. The species is known for its adaptability to varying nitrogen levels in the environment and contains several unique secondary metabolites that have been subjects of scientific research. In 2024, scientists completed a high-quality genome sequence of P. glauca as part of the Darwin Tree of Life Project, providing valuable resources for future studies of this widely distributed lichen that can be found throughout Africa, Asia, Europe, and North America.

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