On Unbelievable Stories (33)

False, too, is the myth about Orpheus: that four-legged beasts, reptiles, birds and trees would follow him when he played the cithara.

I think that this is how things came to pass. Bacchants in their frenzies tore livestock to pieces in Pieria; amongst the other violent things they did, they decamped to the mountains and spent their days there. While they were up there the townsfolk, worried about their wives and daughters, had to summon Orpheus to devise a plan to get them down from the mountain. After sacrificing to Dionysos, he led down the frenzied women playing his cithara. They came down from the mountain holding then for the first time stalks of giant fennel and branches from all sorts of trees. People watching were amazed by the foliage and said, Even the forest comes down from the mountain when Orpheus plays his cithara. And from this event the myth was fabricated.