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 Monocotyledones see Class Liliopsida Batsch (1802)
         Order Liliiflorae
           Family Pontederiaceae Kunth (1816), nom. cons. - water-hyacinth family
             Genus Pontederia L. (1753)
               Pontederia cordata L. - pickerelweed