Agrimony is a yellow UK wildflower
There are two species of Agrimony which are both reasonably common in Britain: Agrimonia eupatoria and Agrimonia procera.
Agrimony – Agrimonia eupatoria
This British wild flower grows in grass and flowers in summer, from June onwards. The five-petalled yellow flowers are about 1cm across and borne on a 70cm high spike. Sometimes the spike has a red tinge, which is one way to distinguish it from Agrimonia procera. A. procera is also taller at about 1m and strongly lemon scented (hence it’s common name Fragrant Agrimony).
But note – Scent alone is not enough to distinguish the species, as there is a scented subspecies of Agrimonia eupatoria.
Agrimonia eupatoria leaves
The leaves are interesting in that they are pinnate (leaflets arranged along the leaf stalk in pairs, usually with an end leaflet) but sometimes with small leaflets in between the main ones. Each leaflet is about 5cm long.