lumpy leaves

lumpy leaves

Observation - lumpy leaves - Southern Africa. Description: This shrub had several leaves with these lumps on them. Can anyone tell me what they are? I suspect insect galls and therefore have placed this Observation under Inverterbrates.

This shrub had several leaves with these lumps on them. Can anyone tell me what they are? I suspect insect galls and therefore have placed this Observation under Inverterbrates.