We may not be in Kansas anymore, but that doesn't keep us from enjoying the striking symbol of the Sunflower State. These gorgeous flowers form crowns on single stems, having been recorded at heights as tall as 7 meters, and the young flower heads are capable of tracking the sun. Sunflowers belong to the world's largest plant family, Asteraceae, which includes dandelions, thistles, daisies, lettuce, and artichokes, and whose members have composite flower heads. The sunflower head consists of a ring of yellow ray flowers surrounding a large cluster of disk flowers, which, in the words of sixteenth-century English herbalist John Gerard, are “set as though a cunning workeman [sic] had of...

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