flame tree

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various trees having brilliant red flowers, especially the royal poinciana or the Australian bottle tree Brachychiton acerifolius.

from The Century Dictionary.

• noun The Nuytsia floribunda of western Australia, a loranthaceous tree with numerous brilliant orange-colored flowers. Also called fire-tree.
• noun The Sterculia acerifolia of New South Wales.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany Any one of several trees or shrubs with yellow or bright red flowers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun 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
• noun a terrestrial evergreen shrub or small tree of western Australia having brilliant yellow-orange flowers; parasitic on roots of grasses
• noun south Australian tree having panicles of brilliant scarlet flowers
• noun north Australian tree having white flowers and broad leaves
• noun tropical American thorny shrub or small tree; fragrant yellow flowers used in making perfumery