The peony is named after Paeon (also spelled Paean), a student of Asclepius, the Greek god of medicine and healing. Asclepius became jealous of his pupil; Zeus saved Paeon from the wrath of Asclepius by turning him into the peony flower (courtesy of Wikipedia).
So there you have it. Where are the Greek gods when you need them? This peony, complete with raindrops is currently in full bloom in the garden.