Help working out design?

I have a small Celtic dragon (design from ancient jewelry piece) - it is rather simple, kind of looks like seahorse head with the body kinda snake like that just curls around to make a circle about the size of a 50 cent piece. It was my 1st tattoo (at 50), and symbolizes my son, who's name is Celtic.

My question is: I want to put a flower with it, to make it look like the dragon is resting in the center of it. I am having a hard time coming up with the right flower, and how to do put it together, so that it will look soft, (the flower would represent me), and not have too much detail to distract from the dragon, and I want it to be very beautiful in design.

This is over my heart.

Can you help me with suggestions on how to design this? What kind of flower? I have asked this before, and I have done searches etc., but I seem better able at helping others than me on this one!

Any thoughts ideas or links would be greatly appreciated.