(Catalpa Speciosa) Catalpa is native to the United States.  Fence posts, railroad ties, furniture, trim for homes and its resistance to rot are the main reasons to plant the tree.  As a landscape tree it produces large clusters of white trumpet flowers with yellow and purple in the interior.  It has large heart shape leaves that make a great shade tree.  In the fall it produces a long seed pod.  It is a robust tree that adapts to demanding growering conditions such as clay soil and drought.  It is used to mediate air polution.  Grows to 60'.  Zones 4-8.