Acarospora veronensis
# 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 region, common in Arizona, southern California, Baja California north and south, Sonora, to outside the region in $Durango.^{:221}$ Each areole bears one to many 0.1–1 mm rounded to angular apothecia that are deeply immersed in the $areole,^{:221}$ with a dull reddish-brown flat to convex $disc.^{:221}$ Cylindrical asci have 100 or more ellipsoid $ascospores.^{:221}$ Lichen spot tests are all negative, and it is UV-. It is an indicator of undisturbed soil habitats. Sometimes specimens may look like Acarospora $strigata.^{:221}$

