Ключевые слова: aquatic plant, canal, combretaceae, duckweed, genus lemna, glaucifoloa craib, hydrophyte, hydrophytic plant, lemma minor, lemna minor, lemnaceae, lesser duckweed, perpusilla, pistia stratiotes, polyrrhiza, pond, river, schleid, spirodela oligorrhiza, stemless water plant, terminalia, water, water lettuce, water plant, well,