Just remember that there is no perfect flower shape as I was told during a recent show. What make your design unique is how you decide to draw or interpret the design.
As for the tooling, I would suggest on the ripples of the flower petals, I would use a 'lifter' to provide the 3d ripple effect. On each side of that ripple, I would use some sort of pearshader or thumbprint to provide some shading down to the center. I would go all crazy with this tool. Think if it as painting with a brush. A painter will start out heavy with the paint and fade out as he progresses to a central point. For the pod, you can use a seeder and cut some stems leading down in the center of the flower. If you want some generally space vertical lines, you can alway use a 'hair' blade to create these instead of the pearshader.
I would highly recommend some scrap leather and some practice on single flowers. I do believe that Chan Geer (I might be wrong) has done some lillies and so has Jeremiah Watt.
Good luck.