Ключевые слова: abstract, aquatic, background, beautiful, beauty, biomass, clean, closeup, crassipes, dirty, ecology, ecosystem, eichhornia, environment, exotic, float, flora, flowering, foliage, fresh, garden, glossy, green, hyacinth, invasive, lake, leaf, national, natural, natural background, nature, outdoor, park, perennial, pest, plant, plants, polluted, pollution, pound, reserve, river, species, summer, texture, tree, tropical, water, weed, wildlife,