The term 'Flower Tree' can refer to three different species of trees: the CATALPA (7 letters), MIMOSA (6 letters), and Tulip (5 letters). The CATALPA is a large, deciduous tree native to North America, with large, heart-shaped leaves and white flowers that bloom in the summer. The MIMOSA is a small, deciduous tree native to Asia, with fern-like leaves and pink or yellow flowers that bloom in the spring. The Tulip tree is a large, deciduous tree native to North America, with large, tulip-shaped leaves and yellow-green flowers that bloom in the spring. All three of these trees are known for their beautiful flowers and make excellent ornamental trees.