belle isle cress

NOUN
16 LETTERS · STARTS WITH B

belle isle cress is a valid 16-letter word worth 18 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
B3E1L1L1E1I1S1L1E1C3R1E1S1S1
3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does belle isle cress mean?