Caloplaca eugyra
When people describe xeric ecosystems and deserts are baren and colorless, I am just like . . . what? Have you seen the guys who live there? Does C. eugyra look baren and colorless to you? This crustose lichen has a yellow-orange, pruinose (covered in a pale, chalky mineral layer), areolate (tile-like) to nearly placcodioid (tile-like in the center with marginal elongated lobes) thallus. The marginal lobes are tightly appressed (attached to the substrate) and crowded, distinguishing characteristics that help to separate it from C. galactophylla. C. eugyra produces flat, rounded apothecia which have a thalline margin and red-orange disks. It grows on calcareous rock in dry, continental North America.
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