Things to know: Scotch broom is labeled as B class noxious weed in Washington state. Is a perennial shrub with many branches, it is 3 to 4 feet high and had flowers the entire length of the branches with very few leaves. And it looks similar to Spanish broom and French broom, 2 A class weeds, and Gorse, a B class weed. The plant spreads by seed in disturbed areas where they can last almost 30 years. The plant is toxic to livestock.
The botanical name is Cytisus scoparius