Boutonniere is derived from the French word for the button hole on a lapel. The history of the groom decorating his coat with a bloom dates back for centuries and at times was quite symbolic.
Boutonnieres can also extend a theme of the wedding or personify a special flower in the history of the bride and groom.
Perhaps a fall outdoor wedding could feature an acorn adorned with fall foliage. Maybe throughout their courtship, the groom sent the bride wildflowers. Click on the image below to view.