Yes, FLAMBOYANTS is a Scrabble word!

Letter values in Scrabble US: F 4, L 1, A 1, M 3, B 3, O 1, Y 4, A 1, N 1, T 1, S 1.

Is it a valid word?

FLAMBOYANTS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

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

Also: royal poinciana, flame tree, peacock flower, delonix regia, poinciana regia.