Any handheld floral without a base is considered a bouquet. Bouquets can be wrapped for convience and placed in a vase for display. These beautiful creations often have long bare stems to hold onto.
There are a variety of bouquet types. From your standard round posy (full and domed), your long stemmed Strauss and your front facing/trailing bouquet. There is also the sheath style which can lay in your arm rather then held in your hands.