October usually means the flowers are beginning to fade, but here on the island the Sunflowers are still in their glory. We turned around and went back for a second look when we saw this one, backlight by the late afternoon sun. Sunflower facts: A well-known sunflower characteristic is that the flowering heads track the sun's movement, a phenomenon known as heliotropism. The daily orientation of the flower to the sun is a direct result of differential growth of the stem. A plant-growth regulator, or auxin, accumulates on the shaded side of a plant when conditions of unequal light prevail. Because of this accumulation, the darker side grows faster than the sunlit side. Thus, the stem bends toward the sun. ~ Complete Guide to Growing Sunflowers

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