Ключевые слова: alder, allergen, allergy, background, bare, beautiful, beauty, bloom, blossom, botany, branch, bright, bud, catkin, catkins, colored, common, environment, flora, flower, forest, green, growth, march, natural, nature, outdoor, park, parkland, plant, pollen, scenery, season, seasonal, sky, spring, springtime, tree, twig, winter, wood, woods, yellow,