Looks like Sanguisorba obtusa to me.

Liatris or Lythrum are possibilities.

To me, it looks like one of the amaranthus ... caudatus, cruentus ... something like that. Hard to say without seeing the leaves.

second vote for amaranthus

Even Buddleja is possible. It is a late summer bouquet.

Liatris doesn't droop and curve like that. I'd add another vote for Amaranthus.

I'd go with Amaranthus too. A hypochondriacus (honestly!) perhaps.

The bend could be from it having been cut - the key feature is the general appearance of the individual flowers making up the spike, which can just be discerned. And rules out the suggestions made in the first 3 posts. As well as the Buddleja.

Thank you for all your replies. I'm going to study them all. Was anyone familiar with the pic?