Acarospora strigata

Acarospora strigata is an areolate to verruculous crustose lichen that grows on rock around the world, in full sun or shade, and in mesic to arid habitats.^{[1]: 220 [2]} It is brown but may appear white or pale gray if it is covered in a pruina.^[1]: 220 The lichen is common in southwestern deserts of North America.^[2]

Acarospora strigata
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Acarosporales
Family:	Acarosporaceae
Genus:	Acarospora
Species:	A. strigata
Binomial name
Acarospora strigata (Nyl.) Jatta (1906)
Synonyms
Lecanora strigata Nyl. (1855)

Areoles (from tiny to 3 mm) surrounding dark reddish-brown to black apothecia (fruiting bodies) are both highly variable in shape and size, and variable in size relative to each other.^{[1]: 220 [2]} Measuring 0.1–1 mm, the apothecia range in size from small dots on the areoles to almost as wide as the areole.^{[1]: 220 [3]} They can be pointlike to round, polygonal to stellate radiating fissures, and one to many per areole.^[2]

Areoles may be cracked on the surface, especially toward the apothecia.^[1]: 220

Lichen spot tests are all negative.^{[1]: 220 [2]}