Gall on Alexanders

Gall on Alexanders

Observation - Gall on Alexanders - UK and Ireland. Description: Yellow blisters with thickening on the underside of the leaf - and on the stem of another plant. The causer is a rust fungus.

Yellow blisters with thickening on the underside of the leaf - and on the stem of another plant. The causer is a rust fungus.