Christmas bush noun8 •Plants, of mostly unrelated species, that bloom around Christmas time. •A small tree or shrub that occurs in all Australian states of species Bursaria spinosa. •A New South Wales Christmas bush, a tall shrub from Australia of species Ceratopetalum gummiferum. •A tropical shrub of species Chromolaena odorata, of the sunflower family. •A poisonous shrub of species Comocladia dodonaea, of Caribbean islands. •A New Zealand Christmas bush of species Metrosideros excelsa and Metrosideros kermadecensis •A Victorian Christmas bush (Prostanthera lasianthos), a shrub of Australia. •A legume from northern South America of species Senna bicapsularis. formsChristmas bushes