A bouquet greenery is a combination of plants and flowers used to decorate a bouquet. The two crossword solutions for the term are FERN (4 letters) and Roseleaves (10 letters). Ferns are a type of plant with long, thin leaves that are often used in bouquets. Roseleaves are the leaves of a rose bush, which are also commonly used in bouquets. Together, these two plants create a beautiful and unique bouquet greenery.