Yes, DOGBANE is a Scrabble word!

Letter values in Scrabble US: D 2, O 1, G 2, B 3, A 1, N 1, E 1.

Is it a valid word?

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

any of several poisonous perennial plants of the genus Apocynum having acrid milky juice and bell-shaped white or pink flowers and a very bitter root