Populus angustifolia James × Populus sargentii Dode var. hastata

Montana: Big Horn County: Southwestern Bighorn County. East of Bighorn River about 2 miles above the Wyoming border.
45.03648° N, 108.230953° W,
Datum: WGS 84. Uncertainty: 1189 meters. Coordinate Source: Digital Map.
Moist river bottom and along river. Phenology: Fruits.

W. E. Booth 54650, Jul 18, 1954
MONT, Accession: 48716