Dryas

When Lycurgus heard that Dionysus was in his kingdom, imprisoned all the followers of Dionysus, the Maenads. Dionysus fled, taking refuge with Thetis. Dionysus then sent a drought and the people revolted. Dionysus made King Lycurgus insane, and he sliced his own son, Dryas, into pieces with an axe, thinking he was a patch of ivy[?], a plant holy to Dionysus. An oracle then claimed that the land would stay dry and barren as long as Lycurgus was alive. His people had him drawn and quartered. With Lycurgus dead, Dionysus lifted the curse.

In Botany, Dryas[?] is a plant genus, family rosaceae