Their vegetation includes bluegrass, bromegrass, Russian thistle, alfalfa, and seedlings of eastern cottonwood and willow. The woody canopy is a mix of eastern cottonwood or black willow. This resulted in the cutting down of the then oldest eastern cottonwood poplar in Europe. "Liard" (Car #316) is the French word for "eastern cottonwood". Trees used for this purpose include oak, maple, the eastern cottonwood, and American tulip tree. The Balmville Tree (cut in 2015) was the oldest eastern cottonwood in the United States. Riparian areas were dominated by eastern cottonwood, hackberry ("Celtis occidentalis"), and silver maple ("Acer saccharinum").