Yes, JESSAMINES is a Scrabble word!

Letter values in Scrabble US: J 8, E 1, S 1, S 1, A 1, M 3, I 1, N 1, E 1, S 1.

Is it a valid word?

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

a climbing deciduous shrub with fragrant white or yellow or red flowers used in perfume and to flavor tea

Also: common jasmine, true jasmine, jasminum officinale.