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Sunflowers against the sky

Sunflowers. A group of blooming sunflowers, Helianthus sp., against the sky. The plantproduces composite flowers:- the small, trueflowers are clustered into a compact, round headwhich resembles a single flower. The sunflowerheads bend towards the sun because a chemical, auxin, builds up in the shaded part of the stemcausing these parts to grow more quickly.Sunflowers can be grown in dry soils from theequator to 55 degrees latitude. The plant iswidely cultivated for its seeds which are used tomake oil and as food for livestock. Photographedat Fraser Valley in British Columbia, Canada.. Stunning Photo Gifts From Science Photo Library