Allgold Broom
Cytisus x praecox 'Allgold'
Pea Family (Fabaceae)
This small bush was so wonderfully fragrant, I had to look up more about it. And I don't know how they managed to get it to not die during our winters, unless it's kept in a greenhouse and then moved out in spring for the warmer season. I would have found a spot in my yard just for the fragrance.