is a specific kind of: bush, shrub.

is a broader term that covers: bird of paradise, Caesalpinia gilliesii, poinciana, Poinciana gilliesii | Caesalpinia pulcherrima, flamboyant tree, paradise flower, Poinciana pulcherrima, pride of barbados | Alpine golden chain, Laburnum alpinum, Scotch laburnum | common laburnum, golden chain, golden rain, Laburnum anagyroides | Asiatic sweetleaf, sapphire berry, Symplocus paniculata.

is a member of: Angiospermae, Anthophyta, class Angiospermae, division Anthophyta, division Magnoliophyta, Magnoliophyta.