The Rio Grande Cottonwood is also popularly known as the Fremont Cottonwood, Common Cottonwood, Valley Cottonwood, Marsh Cottonwood, Alamo and Alamillo. Its scientific name reflects its membership in the poplar family, which includes the poplars, the aspens and the other cottonwood species. Like many Southwestern plants, its scientific name also bears the stamp of John C. Fremont, the famed 19th century "Pathfinder of the West."

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