Is this a daisy-like green flower with six petals?
The green "petals" are sepals. The two lavender and white tubes on the left provide a clue. The central disc used to hold the flowers.
This is wild bergamot (Monarda fistulosa). When in bloom it looks like this.
Still don't recognize it? Click here to see a flower bed full of Monarda fistulosa.
It's a challenge to identify flowers when they've gone to seed.
(photos by Kate St. John)