Cytisus multiflorus is a shrub that is not native to California.
There is a high risk of this plant becoming invasive in California according to Cal-IPC.
[Wikipedia] Iberian Peninsula native: It is native to the Iberian Peninsula, especially frequent in the western half in central and northern interior Portugal[6] and central and northern western Spain.[7] It is better known as an introduced species on other continents, including Australia and North America, where it has become a weed in agricultural land and an invasive species in natural habitats. (contributed by Mary Ann Machi)
[Wikipedia] Noxious weed: This plant is a serious noxious weed of agricultural fields and a colonizing invasive plant in wild lands in parts of Australia and California,[8] where it was first introduced as an ornamental shrub for its prolific white flowers. It is still sometimes grown and sold for landscaping purposes despite its status as a pest plant, with new industry and public education programs resulting (contributed by Mary Ann Machi)
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2023. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 05/31/2023).