•
Celtis conferta subsp. amblyphylla, a tree in the hemp and hackberry family •
Hibiscus tiliaceus, a flowering shrub or tree in the mallow family • In the genus
Populus, a number of difficult-to-distinguish trees: •
Populus angustifolia (narrowleaf cottonwood), in the Great Basin •
Populus balsamifera (balsam cottonwood), in Canada and parts of northern United States •
Populus heterophylla (swamp cottonwood), in the eastern United States •
Populus trichocarpa (black cottonwood), in the Pacific Northwest of North America •
Populus x jackii (balm-of-Gilead) •
Populus × acuminata, lanceleaf cottonwood, •
Populus sect. Aigeiros, a section of three species •
Populus deltoides (eastern cottonwood), in eastern, central, and southwestern United States, and parts of Canada and Mexico •
Populus fremontii (Fremont cottonwood), in the southwestern United States and Mexico •
Populus nigra (black poplar), in Europe, Asia, and Africa ==Places==