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