Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
   Class Magnoliopsida Brongn. (1843) see Subclass Magnoliidae Novák ex Takht. (1967)
     Subclass Asteridae Takht. (1967) see Superorder Asteranae Takht. (1967)
       Superorder Campanulanae Takht. ex Reveal (1992) see Order Asterales Lindl. (1833)
         Order Campanulales Juss. ex Bercht. & J. Presl (1820) see Order Asterales Lindl. (1833)
           Family Campanulaceae Juss. (1789) - bellflower family
             Subfamily Ostrowskioideae (An. Fedorov, 1957) A. Takhtajan (1997) see Tribe Ostrowskieae Fed. (1957)
               1 Genus Ostrowskia Regel (1884)