Pertusariaceae Varicellaria hemisphaerica (Pertusaria hemisphaerica) Growth type crustose Chemistry: Soralia K-, C+ carmine-red, KC+ red, P-, UV+/- glaucous Can be frequent on lower part of trunk of well-lit or slightly shaded, mature, rough-barked, deciduous trees. BLS conservation evaluation: LC L* Smooth or warted pale bluish-grey thallus with broad, zoned, whitish prothallus and conspicuous pale bluish-grey or concolorous soralia, often becoming confluent. Similar: Loxospora elatina is K+ yellow and occurs on damp, acid bark. Ochrolechia androgyna. Yellowish soredia. C+ red, KC+ orange-red

Varicellaria hemisphaerica (Pertusaria hemisphaerica)
Holton Lee and Kingston Lacy, Dorset. March 2013, November 2016