cytisus scoparius(n = noun.plant) common broom, green broom, scotch broom - deciduous erect spreading broom native to western Europe; widely cultivated for its rich yellow flowers;
is a kind of broom
is a member of cytisus, genus cytisus

andropogon scoparius, cytisus, cytisus albus, cytisus multiflorus, cytisus ramentaceus, genus cytisus