Clytie. To find out more about Clytie and her love for Apollo, see this Wikipedia article: link; for information about the image: image source.
Poor Clytie was a nymph who was madly in love with Apollo (or, in some versions, the sun god Helios), but he abandoned her. She pined away with longing for the god and was eventually turned into a heliotrope, a flower whose face is always turning towards the sun.
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