Jenny Vestal answered:
Hi Akua - I used syringe clay to make the little lines down the center of the leaves. There are a couple of tiny balls at the base of the leaves that are scraps of clay I balled up. When constructing it I painted and fired the leaves first, and then joined it together with an oil paste. You can buy that premade or make your own with essential oil and clay. It's a little thicker than what you paint on the leaves, and the oil helps it be strong.