Populus

Populus balsamifera

Balsam poplar

Populus fremontii

Fremont's cottonwood

Populus grandidentata

Bigtooth aspen

Populus heterophylla

Swamp poplar

Populus nigra

Lombardy poplar

Populus simonii

Simon poplar

Populus tremula

European aspen

Populus ilicifolia

Populus yunnanensis

Yunnan poplar

Populus × ningshanica

Populus × rouleauana

Populus × sibirica

Populus balsamifera subsp. balsamifera

Populus deltoides subsp. wislizenii

Populus alba subsp. pyramidalis

Populus acerfolia

Populus acerifolia

Populus alexanderi

Populus ambigua

Populus angustifolia

Mountain cottonwood