Yes, TOADFLAX is a Scrabble word!

Letter values in Scrabble US: T 1, O 1, A 1, D 2, F 4, L 1, A 1, X 8.

Is it a valid word?

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

common European perennial having showy yellow and orange flowers; a naturalized weed in North America

Also: butter-and-eggs, wild snapdragon, devil's flax, linaria vulgaris.