Fennel, or possibly dill. Growing on the site of the former local authority plant nursery, so quite likely an escaped cultivar.
David
Silk button spangle gall wasp galls under an oak leaf
Silk button spangle galls, circular with a depression in the middle, thickly strewn on the underside of an oak leaf. Common spangle galls, also found on the underside of oak leaves, rise to a peak in the centre.






