eastern cottonwood (Populus deltoides Bartr. ex Marshall)

eastern cottonwood (Populus deltoides subsp. deltoides)

Populus deltoides subsp. wislizeni (S. Watson) Eckenw.

plains cottonwood (Populus deltoides subsp. monilifera (Ait.) Eckenwalder)

Populus deltoides × Populus × Populus canadensis

Populus deltoides subsp. wislizenii (S. Wats.) Eckenwalder

Populus deltoides W. Bartram ex Marshall

Rio Grande cottonwood (Populus deltoides wislizeni)

Populus deltoides × Populus nigra

Populus deltoides ssp. monilifera

Populus deltoides × Populus tremuloides

Populus deltoides × Populus maximowiczii

Populus nigra × Populus deltoides

Populus balsamifera × Populus deltoides

Populus deltoides × Populus simonii

Populus trichocarpa × Populus deltoides

Populus deltoides var. monilifera × Populus tremuloides

Populus deltoides ssp. monilifera (Aiton) Eckenw.

Populus deltoides W. Bartram ex Marshall

eastern cottonwood (Populus deltoides Bartram ex Marsh. ssp. deltoides)

Fremont cottonwood (Populus fremontii subsp. mesetae J. E. Eckenwalder)

Populus deltoides deltoides

Fremont cottonwood (Populus fremontii subsp. fremontii)

Poplar (Populus)