clammy chickweed

NOUN
16 LETTERS · STARTS WITH C

clammy chickweed is a valid 16-letter word worth 39 points in Scrabble and 43 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3L1A1M3M3Y4C3H4I1C3K5W4E1E1D2
3 + 1 + 1 + 3 + 3 + 4 + 0 + 3 + 4 + 1 + 3 + 5 + 4 + 1 + 1 + 2 =39 PTS
DOUBLE WORD → 78TRIPLE WORD → 117
MEANING

What does clammy chickweed mean?