Yes, SUNDEWS is a Scrabble word!

Letter values in Scrabble US: S 1, U 1, N 1, D 2, E 1, W 4, S 1.

Is it a valid word?

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

any of various bog plants of the genus Drosera having leaves covered with sticky hairs that trap and digest insects; cosmopolitan in distribution

Also: sundew plant, daily dew.