Boutonniere
From Wikipedia, the free encyclopedia
A boutonniere, also buttonhole, is a flower or floral decoration pushed or pinned through the button hole of a lapel of a suit. While worn frequently in the past, boutonnieres are now usually reserved for special occasions for which a dinner suit is standard like proms and weddings. The wearing of the boutonniere is a tradition originating in France.
It is an American prom custom for the female to purchase the boutonniere for her male date and for it to match the corsage.