Lewis & Short

spartārĭus, a, um, adj. [spartum], of or belonging to broom, bearing broom: Carthago, New Carthage, in Spain, Plin. 31, 8, 43, § 94.
Plur. subst.: spartārĭa, ōrum, n., places where broom grows, Plin. 11, 8, 8, § 18.