Hawaii's official state flower is the yellow hibiscus (additionally, each individual island has its own official flower). Several varieties exist with red in various places, but the one I'm doing is primarily yellow with red dots in the middle (I'm guessing they're stamens). All you'll need to pipe yellow hibiscus flowers are stiff consistency royal icing (in yellow, of course; I used Lemon Yellow Soft Gel Paste by AmeriColor), tip #104, tip #5, a glue stick, a flower nail, parchment paper squares, a Styrofoam block to rest the nail in, and a dusting pouch filled with a 50/50 blend of powdered sugar and cornstarch. You'll also need round toothpicks and AmeriColor's Super Red to make the dots that represent the stamens. Use a 5-petal flower nail template if it helps you to keep the petals even.
Lastly, when the flower has dried, use the pointy end of a round toothpick to paint the red dots of food color in the center. Aloha!