Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct. Class Liliopsida Batsch (1802) see Class Magnoliopsida Brongn. (1843) Subclass Aridae Takht. (1997) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820) Superorder Aranae Thorne ex Reveal (1992) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820) Order Arales Juss. ex Bercht. & J.Presl (1820) see Order Alismatales R.Br. ex Bercht. & J.Presl (1820) Family Lemnaceae Martinov (1820), nom. cons. - duckweed family see Subfamily Lemnoideae Babington (1843) Subfamily Lemnoideae Babington (1843) 1 Genus Spirodela Schleid. (1839) 2 Genus Lemna L. (1753)