Lanceleaf
Populus x acuminata
Height: 40-60'
Width: 30-40'
Zone: 2 Dubois: YA great choice for adding shade to the landscape quickly. With dense foliage and a pyramidal form as it matures. The narrow lance shaped leaves turn yellow in the autumn. Seedless and cottonless.
Robusta
Populus deltoides 'Robusta'
Height: 40-60'
Width: 30-40'
Zone: 3 Dubois: YAnother very vigorus tree for our area. This cotonless cotonwood has an irregulary rounded canopy with coars spreading branches.
Siouxland
Populus deltoides 'Siouxland'
Height: 50-60'
Width: 30-40'
Zone: 3 Dubois: YAnother great cottonless cotonwood tree introduced by the South Dakota State University. Cold hard, and heat tolerant. Makes a great fast growing shade tree