Yes, SALSIFIES is a Scrabble word!

Letter values in Scrabble US: S 1, A 1, L 1, S 1, I 1, F 4, I 1, E 1, S 1.

Is it a valid word?

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

edible root of the salsify plant
Mediterranean biennial herb with long-stemmed heads of purple ray flowers and milky sap and long edible root; naturalized throughout United States
either of two long roots eaten cooked

Also: oyster plant, vegetable oyster, tragopogon porrifolius.