Stereocaulaceae Lepraria vouauxii Growth type leprose Chemical results: Thallus K+ dirty yellow to orange, C+ dirty yellow, P+ orange or orange-yellow, UV- Avoids very acidic substrates. Found on intermediate or basic walls, mortar and bark on surfaces sheltered from rain. Diffuse, thickish crust of pale greyish-green granules with +/- indistinct lobed margins and white medulla. Apothecia are unknown. Similar: Lepraria nivalis is K+ yellow, C-

Lepraria vouauxii
Lychett Matravers, Dorset. January 2014