A boutonniere is a small floral decoration typically worn on the lapel of a man's suit or tuxedo. It is often made from a single flower or a small cluster of flowers, and it is commonly used during formal events such as weddings, proms, or other celebrations. The boutonniere is usually pinned to the left side of the jacket, just above the heart. Traditionally, the boutonniere is worn by the groom and groomsmen at weddings, symbolizing their role in the ceremony. It can also be worn by guests to show support or to match the wedding colors. Popular flowers for boutonnieres include roses, carnations, and orchids.