Flora van Nederland Haeckel (1866) - plants
   Division Spermatophyta Goebel (1882) see Phylum Spermatophyta Goebel (1882)
     Subdivision Angiospermae J. Lindley (1830) see Infraphylum Angiospermae auct.
       Class Dicotyledones see Class Magnoliopsida Brongn. (1843)
         Order Salicales Lindl. (1833) see Order Malpighiales Juss. ex Bercht. & J.Presl (1820)
           Family Salicaceae Mirb. (1815), nom. cons. - willow family
             Genus Populus L. (1753) - poplars
               1 Populus alba L.
               2 Populus canescens (Aiton) Sm.
               3 Populus gileadensis Rouleau see Populus candicans Aiton (1789)
               4 Populus tremula L. - aspen
               5 Populus nigra L.
               6 Populus deltoides Bartram ex Marshall
               7 Populus ×canadensis Moench (pro sp.)