angiosperms - flowering plants see Subclass Magnoliidae Novák ex Takht. (1967)
   Order Piperales Bercht. & J.Presl (1820)
     1 Family Aristolochiaceae Juss. (1789), nom. cons. - birthwort family
     2 Family Lactoridaceae Engl. (1888), nom. cons. - Lactoris family see Family Aristolochiaceae Juss. (1789), nom. cons.
     3 Family Piperaceae Giseke (1792), nom. cons. - pepper family
     4 Family Saururaceae F.Voigt (1811), nom. cons. - lizard's-tail family