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 Rosales Bercht. & J.Presl (1820)
           Family Rosaceae Juss. (1789), nom. cons. - rose family
             Genus Crataegus L. (1753)
               Crataegus laevigata × rosiformis
               Crataegus monogyna × rosiformis
               1 Crataegus laevigata (Poiret) DC.
               2 Crataegus monogyna Jacq. (1775)
               3 Crataegus rosiformis Janka