Dermatocarpon americanum, the American stippleback lichen, is a silvery-gray, leafy (foliose) lichen with black dots that is common on near seeps in rock faces from southwestern North American deserts to coastal areas.

[1] It is common in deserts on vertical rock surfaces that are partially shade protected near seepages.

[1][2] It is umbilicate, meaning it grows from a single anchoring stem called a holdfast), with a single-leaf body (thallus), which ranges in size from 1.7–6 cm.

[1][3] The dusty looking top silvery coating on the cortex is dead fungal filaments (hyphae) filled with air (epinecral).

[1] The black dots on the surface are the tops of the holes of flask shaped fruiting bodies that are embedded in the thallus, called perithecia.