Mischievous nymphs were said to hide in the petals of the Peony thus causing this magnificent flower to be given the meaning of Shame or Bashfulness in the Language of Flowers. It was named after Paeon, a physician to the gods, who obtained the plant on Mount Olympus from the mother of Apollo. Once planted the Peony likes to be left alone and punishes those who try to move it by not flowering again for several years. Once established, however, it produces splendid blooms each year for decades. (Taken from The Language of Flowers, edited by Sheila Pickles, 1990.)
This photo was taken this morning. The Peonies haven't opened up completely but are very close, as you can see.