Noun | 1. | Spartium - one species: Spanish broom rosid dicot genus - a genus of dicotyledonous plants Papilionoideae, subfamily Papilionoideae - alternative name used in some classification systems for the family Papilionaceae Spanish broom, Spartium junceum, weaver's broom - tall thornless shrub having pale yellow flowers and flexible rushlike twigs used in basketry; of southwestern Europe and Mediterranean; naturalized in California |