Cottonwood is the Nebraska state tree. It is native across the state and usually is found adjacent to rivers, streams, and around lakes. Cottonwood has a fast growth rate and provides most of the lumber processed in Nebraska today. It is planted in riparian areas for filter strips, and near streams to reduce sedimentation and stabilize stream banks. It also can be used in multiple row windbreaks for height and quick protection. Native trees can become infested by leaf beetles, twig borers and stem canker, but these are rarely serious problems.