A mythological flower from my imagination. It ill be part of a story I am writing:
There is a mildly rare plant that has the curious property of inducing strong feelings of nostalgia, and if served as a tea or consumed, can create lucid memories that live inside the flowers. Once "viewed," a memory will continue to live inside the host, seeming to be a native memory.
Some are so overcome by the experience that people are known to sit in the memory flower fields for hours, feeling the lost memories of lives they never lived, but are so certain they did.