mouse eared chickweed

NOUN
21 LETTERS · STARTS WITH M

mouse eared chickweed is a valid 21-letter word worth 37 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3O1U1S1E1E1A1R1E1D2C3H4I1C3K5W4E1E1D2
3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 2 + 0 + 3 + 4 + 1 + 3 + 5 + 4 + 1 + 1 + 2 =37 PTS
DOUBLE WORD → 74TRIPLE WORD → 111
MEANING

What does mouse eared chickweed mean?