canebrake rattlesnake

NOUN
21 LETTERS · STARTS WITH C

canebrake rattlesnake is a valid 21-letter word worth 32 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3A1N1E1B3R1A1K5E1R1A1T1T1L1E1S1N1A1K5E1
3 + 1 + 1 + 1 + 3 + 1 + 1 + 5 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 5 + 1 =32 PTS
DOUBLE WORD → 64TRIPLE WORD → 96
MEANING

What does canebrake rattlesnake mean?