A travel rose is a magical flower that brings someone to the world of the living when they are in the Underworld, This happens when the wielder crushes the rose.
Percy Jackson and the Olympians
The Demigod Files
The Sword of Hades
Percy Jackson, Thalia Grace, and Nico di Angelo are each given a Travel Rose when they return Hades' Sword back to Persephone. However, Nino didn't use his, as he decides to stay in the Underworld for a while.
Trivia
- Persephone's travel roses are similar in usage to Poseidon's pearls, as both are used as a quick means of leaving the Underworld. Incidentally, the pearls belong to Persephone in The Lightning Thief film.