Two plants, Spanish broom (Spartium junceum) and gorse (Ulex europaeus): flowering and fruiting stems. Coloured etching by C. Pierre, c. 1865, after P. Naudin. | Wellcome Collection
Spanish broom identification and control: Spartium junceum - King County
Spanish Broom - Encyclopedia of Life
Spartium Junceum Spanish Broom - Clarenbridge Garden Centre