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 Gentianales Juss. ex Bercht. & J.Presl (1820)
           Family Rubiaceae Juss. (1789), nom. cons. - coffee family
             Genus Asperula L. (1753)
               1 Asperula cynanchica L.
               2 Asperula arvensis L. - blue woodruff