Earlier this year, we designed very spring-looking bouquets for one of our brides. We used seasonal flowers including peonies, ranunculus, and sweet pea for the bride and her maids. Here are some shots we took just before delivery.
This bridal bouquet showcased green hydrangea as a background, ivory roses, and white sweet pea. The sweet pea is the paper thin, clam-shaped flower seen all throughout the bouquet. 
The bridesmaids carried these bouquets of white peonies and orange/coral ranunculus.
All three of these flowers come in many different colors and can be used in different ways. Ask about their availability for your wedding or event!