Once Geralt brings Triss to the elven ruins in the forest outside Flotsam, a new rose bush bearing purple roses appears. These are roses of remembrance. Triss tells the witcher the legend of Eldan and Cymoril which states that the roses will wilt unless they are nourished with blood or if they are sold. If one gives the flower to someone they love, they will live forever. Geralt then has the option to give the rose to Triss, or not.