Ключевые слова: alder, alder catkins, aldertree, allergy, alnus, alnus incana, background, beauty, blue, botanical, branch, branch with catkins, bright, brown, buds, catkin, clear, close, closeup, common, common alder, cone, detail, dry, european alder, figure, flora, glass, growth, kidney, multicolored, nature, outside, park, season, seasonal, set, shackle, shape, spring, springtime, sun, sunlight, tree,