Spanish broom (Spartium junceum) is a fast-growing, drought-tolerant shrub native to the Mediterranean region, recognized by its bright yellow, pea-like flowers and slender, green, nearly leafless stems. It can create a striking display in dry landscapes and is often valued for its fragrance and ability to thrive with little water, but it has escaped cultivation and become invasive in parts of California and other regions.
It is toxic to pets, particularly if they chew or eat its seeds, flowers, or other plant parts. It contains quinolizidine alkaloids that can cause drooling, vomiting, weakness, tremors, abnormal heart rhythms, and potentially more serious poisoning with larger ingestions. Because the plant can be hazardous to dogs and cats, it is best kept away from pets that are likely to chew on garden plants.