| Noun | 1. | flame tree - a terrestrial evergreen shrub or small tree of western Australia having brilliant yellow-orange flowers; parasitic on roots of grasses |
| 2. | flame tree - 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 | |
| 3. | flame tree - north Australian tree having white flowers and broad leaves Synonyms: Brachychiton australis, broad-leaved bottletree | |
| 4. | flame tree - south Australian tree having panicles of brilliant scarlet flowers | |
| 5. | flame tree - tropical American thorny shrub or small tree; fragrant yellow flowers used in making perfumery Synonyms: Acacia farnesiana, cassie, huisache, mimosa bush, scented wattle, sweet acacia, sweet wattle |