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The Eastern Cottonwood, (Salicaceae Populus deltoides,) was named as Nebraska's first state tree on Feb. 15, 1937, when a resolution introduced by Sen. Alois Slepicka of Wilber was passed. It was chosen because it was: Known throughout Nebraska for its beauty, and because of its historical background, it being the tree under which George Washington sat while signing a treaty."
The 1972 Legislature named the cottonwood (Populus deltoides marsh) as the state tree. The bill, introduced by Sen. Calvin Carsten of Avoca, originally called for the green ash to be the state tree, but was amended in favor of the cottonwood. The cottonwood often is associated with pioneer Nebraska. Several famous early landmarks were cottonwood trees and their shoots were often collected by settlers who planted them on their claims.
Today, the cottonwood grows throughout the state. 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. The green ash was designated as the 1972 Arbor Day Centennial Tree.
Besides the typical eastern variety (var. deltoides), there is a western variety, plains cottonwood (var. occidentalis). Its leaves, more broad than long, are slightly smaller and more coarsely toothed than the typical variety.
Populus deltoides, the eastern cottonwood, is a cottonwood poplar native to North America, growing throughout the eastern, central, and southwestern United States, the southernmost part of eastern Canada, and northeastern Mexico
The law designating the cottonwood as the official Nebraska state tree is found in the Nebraska Statutes, Chapter 90 (Special Acts) Section 90-114.
Chapter 90 § 90-113
90-113. State tree; cottonwood.
The cottonwood is hereby declared the state tree of Nebraska.
Laws 1972, LB 1089, § 1;
C.S.Supp.,1974, § 84-730.
Taxonomic Hierarchy: Eastern Cottonwood
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Family: Salicaceae - Willow family
Genus: Populus L. - cottonwood
Species: Populus deltoides W. Bartram ex Marshall - eastern cottonwood