Ключевые слова: allergy, backgrounds, bloom, blue, botany, branch, branches, bright, cottonwood, cottony, down, feathery, fertile, filament, floating, floral, fluffy, free, fun, growth, horizontal, joy, leaf, leaves, lightweight, lots, many, nature, nobody, outdoors, pattern, plant, poplar, propagation, puffballs, puffy, quantity, seed, seeds, silky, sky, soft, sunlight, sunlit, sunny, thready, tree, unique, unusual, windborne,