Ключевые слова: alder, alnus, autumn, bark, black alder, bloom, blossoms, branch, brown, collage, common alder, deciduous tree, european alder, example, foliage, forest, forestry, fruits, german, glutinosa, green, grow, illustration, impression, in the green, leaf, leaves, life, log, native, nature, outdoors, outline, plant, rotenle, rural, sky, stylesheet, summer, tree, trees, treetop, wilderness, wood,