WordNet sense 1 (a terrestrial evergreen shrub or small tree of western Australia having brilliant yellow-orange flowers; parasitic on roots of grasses):

Christmas tree, fire tree, Nuytsia floribunda

WordNet sense 2 (showy tropical tree or shrub native to Madagascar; widely planted in tropical regions for its immense racemes of scarlet and orange flowers; sometimes placed in genus Poinciana):

flamboyant, royal poinciana, Delonix regia, peacock flower, Poinciana regia

WordNet sense 3 (north Australian tree having white flowers and broad leaves):

Brachychiton australis, broad-leaved bottletree

WordNet sense 4 (south Australian tree having panicles of brilliant scarlet flowers):

Brachychiton acerifolius, flame durrajong, Sterculia acerifolia

WordNet sense 5 (tropical American thorny shrub or small tree; fragrant yellow flowers used in making perfumery):

huisache, cassie, Acacia farnesiana, mimosa bush, scented wattle, sweet acacia, sweet wattle