The flowers are from SU! - Bothway Blossoms. They were a Hostess set from a few years back. I used to use these stamps all the time - They have the battle wounds to show from it too!
Using SU!'s Simple Shapes to color the flowers is super fast and gives a really cool, graphic look. I used two sizes of solid circle on each flower. That way it is a little darker in the middle which draws your eye in to each bloom (that's what I think anyway).