Ключевые слова: abstract, allergen, allergenic, allergy, ambrosia, annual, artemisiifolia, asthmatic, background, blooming, blossom, botany, color, common, dangerous, disease, field, flora, flower, grass, green, growth, harmful, head, healthy, illness, immunsystem, inflorescence, leaf, lifestyle, meadow, medical, natural, nature, nose, outdoor, overgrown, pattern, pest, plant, pollen, quarantine, ragweed, season, seasonal, sickness, stem, summer, time, weed,