Nature & Science
At Fort Union the transformation from a frontier to an agricultural environment led to the reduction and extirpation of native plant species, followed by the introduction or invasion of exotics. The most notable exotics at Fort Union are crested wheat grass and smooth brome, Canada thistle and Leafy spurge.
GRASSES-Dominant native grass species include green needle grass, blue grama, western wheat grass, side oats grama and needle and thread grass.
Trees-Cottonwood trees dominate the riparian area, ash and dogwood trees also are found.
SHRUBS-Willow species, Choke cherry, and buffalo berry are the predominant shrubs.
Did You Know?
Northern Plains tribes made up the entire bulk of trade at Fort Union. Camps usually came in the spring to trade buffalo robes and furs for trade goods. This trade did continue throughout the year even though spring was considered trade season.