Multiple exposure. Camera on tripod; zoom out in six steps while keeping the center orange lily in a fixed position.
Almost went with this image instead - http://www.pbase.com/image/30848062
All it takes is a goo tripod and head. Lock the focus on the center of interest and then repeat - shoot, zoom, shoot, zoom, .... Open the resulting multiple exposures in PS and combine via layers and opacity adjustments.
Very creative although I think i would have popped the contrast just a teeny bit for more depth. I cannot imagine being able to do this.. keeping the center centered. As I said very creative. I like your "reject" very much because of the difference in colors between the background and the flower.. unusual and that is a goooood thing.