Acarospora veronensis

Acarospora veronensis is a medium brown to dark brown or black crustose lichen that grows up to 4 cm (1.6 in) wide.:221 It is extremely variable in its growth forms, being verruculose, rimose, areolate, or squamulose.:221 It has 0.2–1.5 mm round to angular areoles which may be lobed, and may be contiguous or dispersed.:221 It grows on acidic rocks, basalt, and sometimes on wood.:221 It is one of the most common members of its genus in the Sonoran Desert...