Texas Vascular Plant Checklist:  Lemnaceae
The Duckweed Family
(Magnoliophyta, Liliopsida, Arecidae)

 Lemna
   aequinoctialis Welw. (lesser duckweed)
   gibba L. (swollen duckweed)
   minor L. (common duckweed, water lentil)
   minuta Kunth (least duckweed)
   obscura (Austin) Daubs (little duckweed)
   perpusilla Torr. (minute duckweed)
   trisulca L. (star duckweed, ivy duckweed)
   turionifera Landolt (turion duckweed)
   valdiviana Phil. (pale duckweed)

 Spirodela
   polyrrhiza (L.) Schleid. (common duckmeat)
   punctata (G.F.W. Mey.) C.H. Thompson (dotted duckmeat)

 Wolffia
   brasiliensis Weddell (brazilian watermeal)
   columbiana Karst. (columbia wolffia)

 Wolffiella
   gladiata (Hegelm.) Hegelm. (sword bogmat)
   lingulata (Hegelm.) Hegelm. (tongue shape bogmat)
   oblonga (Phil.) Hegelm. (saber bogmat)