dogtooth violet

NOUN /dɔɡ,tuθ_'vaɪəlɪt/
15 LETTERS · 4 SYLLABLES · STARTS WITH D

dogtooth violet is a valid 15-letter word worth 22 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2O1G2T1O1O1T1H4V4I1O1L1E1T1
2 + 1 + 2 + 1 + 1 + 1 + 1 + 4 + 0 + 4 + 1 + 1 + 1 + 1 + 1 =22 PTS
DOUBLE WORD → 44TRIPLE WORD → 66
MEANING

What does dogtooth violet mean?