Ключевые слова: aquatic, botanic, botanical, botany, collection, conservation, conservatory, decorative, drops, ecosystem, exotic, fern, floriculture, garden, gardening, glasshouse, greenhouse, habitat, horticulture, hothouse, hygrophyte, large, leaves, moisture, natural, nature, paludarium, petersburg, plant, pond, research, reservoir, riparium, saint, subtropical, tropical, water,