Orchamus

Orchamus was a king of Assyria in Greek mythology. He had two daughters: Leucothea (or Leucothoë ) and Clytia. Leucothea was seduced by Helios, the sun god. Helios disguised himself as Leucothea's mother, Euronome, to gain entrance to her chambers. Clytia, jealous of her sister because she wanted Helios for herself, told Orchamus the truth, betraying her sister's trust. Enraged, Orchamus ordered Leucothea buried alive. Upon her death Helios turned her into the frankincense tree (which was called Leucothoë). Meanwhile, Helios refused to forgive Clytia for betraying his beloved, and a grieving Clytia sat on the ground, neither eating nor drinking but turning her face towards the sun all day as it traversed the sky. When she died, she became heliotrope or sunflower, whose flowers follow the sun every day.