Ophioparmaceae Hypocenomyce scalaris Growth type squamulose. Photobiont chlorococcoid Chemical results: K-, C+ red, KC+ red, P-, UV+ white Common in drier parts of Britain and Ireland on acidic bark, wood, fences and burnt timber. Occasional on bricks and siliceous rocks. Small light greyish-brown to green-brown squamules, +/- overlapping with slightly upturned, finely sorediate margins. Apothecia are rare, the discs blackish with grey-blue pruina. Sometimes host to Clypeococcum hypocenomycis

Hypocenomyce scalaris
On Oak lignum and church wall. Holton Lee and Corfe Mullen, Dorset. December 2012, 2018