Ulex europaeus, invading pasture
The gorse across the valley from our house has finished flowering, for now. The few yellow plants in the picture are almost certainly Scotch broom (Cytisus scoparius).
Example of good area for vegetation monitoring to determine response of female grey willow control
Spiny, hard stems, leaves. Yellow flower. Grows near water edge.
Ulex europaeus (gorse, common gorse, furze or whin) is a species of flowering plant in the family Fabaceae, native to portions of Europe from the northern United Kingdom south to Portugal, and from the western Republic of Ireland east to Galicia in Poland and Ukraine.