I live in Edmonton AB a few yrs ago I got this shrub given to me it was very small in couple of years it has increased quite a bit would say it is about 20 inches now has green leaves and in late June yellow flowers will appear all over it . It is a decidious shrub but have no name for it. Maybe someone can help me have taken samples to some nurserys and they don`t know either. If no one recognizes it now will try again when the flowers come out. Thought it might be related to the broom family