indian rhubarb

NOUN
14 LETTERS · STARTS WITH I

indian rhubarb is a valid 14-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
I1N1D2I1A1N1R1H4U1B3A1R1B3
1 + 1 + 2 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 3 + 1 + 1 + 3 =21 PTS
DOUBLE WORD → 42TRIPLE WORD → 63
MEANING

What does indian rhubarb mean?