Tiny cups on sunflower for ID please.

Tiny cups on sunflower for ID please.

Observation - Tiny cups on sunflower for ID please. - UK and Ireland. Description: These are no larger than 1mm high and are on an old sunflower stalk - anyone any thoughts? Thanks for looking.

These are no larger than 1mm high and are on an old sunflower stalk - anyone any thoughts?

Thanks for looking.