Ключевые слова: alga, algae, aquatic, aquatic plant, aquatic plants, araceae, common duckweeds, duckweed, floating, floating plants, flora, fresh, green, green background, growth, invasive species, lake, landscape, leaf, leaves, lemna, lemna turionifera, lemnaceae, natural, nature, nile cabbage, petal, pistia, pistia stratiotes, pistieae, plant, pond, pontederia, pool, rootless duckweed, seaweed, shellflower, spotless watermeal, stratiotes, surface, swamp, swamp algae, tiny, top view, water, water cabbage, water letter, wolffia,