Growth on leaves

Growth on leaves

Observation - Growth on leaves. Description: Not sure what these are (I'm not even sure what the plants are) The hedgerow was full of these bushes - two adjacent bushes had the leaves covered with these 'Nodules'

Not sure what these are
(I'm not even sure what the plants are) The hedgerow was full of these bushes - two adjacent bushes had the leaves covered with these 'Nodules'