Knapweed II

This is a Knapweed flower in full blossom. The following is an account of how the flower got its "common" name:

"The flower-head is hard and solid, [this can be only partly seen in this picture behind the petals] a mass of bracts lapping over each other like tiles, each having a central green portion and a black fringe-like edge. In some districts the plant is called from these almost round heads, 'Hardhead,' and the ordinary English name, Knapweed, is based on the same idea, Knap, being a form of Knop, or Knob."

[It has also been called] Hardhead. Ironhead. Hard Irons. Churls Head. Logger Head. Horse Knops. Matte Felon. Mat Fellon. Bottleweed. Bullweed. Cowede. Boltsede.

This larger species of Knapweed was in olden times called 'Matte Felon,' from its use in curing felons or whitlows. As early as 1440 we find it called 'Maude Felone,' or 'Boltsede.'"
Botanical.com