trailing four o'clock

NOUN
21 LETTERS · STARTS WITH T

trailing four o'clock is a valid 21-letter word worth 30 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1R1A1I1L1I1N1G2F4O1U1R1O1'0C3L1O1C3K5
1 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 1 + 0 + 1 + 0 + 3 + 1 + 1 + 3 + 5 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does trailing four o'clock mean?

NOUN · 1 SENSE
1

Trailing plant having crowded clusters of 3 brilliant deep pink flowers resembling a single flower blooming near the ground; found in dry gravelly or sandy soil; southwestern United States and Mexico.