Difficult to say whether it is a Celosia or Amaranthus from the picture but
its either one.
JW wrote in message
om...
My father has some volunteer plants in his butterfly garden (mostly
zinnias).
We are unsure as to what this is.
http://www.cyberturf.com/wolgamuths/...s/DSC00052.jpg
It's the purple spikey flower in the background. Thanks!