Black lumps in lines on beech trees

Black lumps in lines on beech trees

Observation - Black lumps in lines on beech trees - UK and Ireland. Description: Black lumps in the lines found in bark on beech trees. They seemed to be melded in with the bark rather than growing on it. High up so couldn't get closer picture - but there were lots, always on the lines going round the tree. Each up to about an inch ac

Black lumps in the lines found in bark on beech trees. They seemed to be melded in with the bark rather than growing on it. High up so couldn't get closer picture - but there were lots, always on the lines going round the tree. Each up to about an inch across.