Spartium junceum (Spanish Broom).
"Trees and Shrubs for English Gardens" by Ernest Thomas Cook
He carried on his arm a basket made of Spanish broom, and proceeded toward the Forum Nundinarium.
"One of Cleopatra's Nights and Other Fantastic Romances" by Thophile Gautier
The oblong table placed near the fireside rested on a thick carpet of Spanish broom or esparto.
"The Knight of Malta" by Eugene Sue