Ключевые слова: agent, allergen, allergenic, allergic, allergy, ambrosia, ambrosia apples, autumn, autumn fever, background, bitterweed, bloom, blooming, botany, burrobrushes, bursages, dangerous, dangerous flower, fever, field, flora, floral, flower, flowering, garden, grass, green, growing, growth, hay, hay fever, health, health care, healthcare, healthy, inflorescence, leaf, natural, nature, outdoors, plant, pollen, pollen allergy, ragweed, season, seed, stem, summer, toxin, weed,