Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Cycadophytanae Doweld (2001)
           Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
             Subphylum Magnoliophytina Reveal (1996)
               Class Magnoliopsida Brongn. (1843)
                 Subclass Piperidae Reveal (1994)
                   Superorder Aristolochianae Doweld (2001)
                     Order Lactoridales Takht. ex Reveal (1993) [monotypic] see Order Piperales Bercht. & J.Presl (1820)
                       1 Family Lactoridaceae Engl. (1888), nom. cons. - Lactoris family see Family Aristolochiaceae Juss. (1789), nom. cons.