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.