Ключевые слова: allergen, allergic, allergy, asthma, background, biology, botanical, botany, cell, closeup, day, disease, fever, flora, floral, flower, garden, germ, grain, grains, hay, macro, magnified, microscope, microscopic, natural, nature, particle, petal, pistil, plant, pollen, pollination, pollinosis, reaction, reproduction, research, rhinitis, science, season, seasonal, seed, spore, sporopollenin, spring, stamen, yellow,