I bought a huge bunch of dahlias for a £1 from a farmer's roadside stall... a riot of colour with lots of the deep red/almost black ones which I love.
I managed to break one of the stalks on the way home, so this flower head has gently unfolded and collapsed in a bowl of water over several days. Such beauty. I'm not sure of the variety - possibly Rip City or Chat Noir. I'm enjoying watching it slowly disintegrate.