Ключевые слова: alder, alder tree, allergy, alnus, alnus glutinosa, background, beautiful, beauty, black alder, bloom, blooming, blossom, blue, botanical, botany, branch, bright, brown, catkin, catkins, closeup, common alder, cone, cones, detailed, details, earrings, female, flora, flower, fresh, green, growth, hanging, leaf, macro, male, natural, nature, outdoors, plant, pollen, season, sky, spring, springtime, tree, twig, yellow,