Groomsmen boutonnieres are complement the bridesmaid bouquets, they are more simplier than the groom's boutonniere. This is most easily achieved by including a flower the same color as the bridesmaid dresses or some of the flowers which are in bride's bouquet. ... The groom's boutonniere is more lavish with more type of flowers which are in bridal bouquet, and have the same color of ribbon as bride's bouquet.

Wedding Buttonholes and How to Wear Them

The little flowers worn in the lapel of the men’s suits at a wedding are known as buttonholes. Sometimes referred to as boutonnières, they are usually worn by the men in the bridal party: the groom, best man, ushers, father-of-the-bride, father-of-the-groom, and sometimes the page boy. Here’s our guide to the different styles of wedding buttonholes and exactly how to wear them.

Wedding Etiquette

Traditionally it is the men who wear buttonholes on the left lapel of their suits. The mother-of-the-bride and mother-of-the-groom often wear a similar floral decoration called a corsage, either pinned to the right side of their outfit or tied with a ribbon around their wrist.