In East Asia the chrysanthemum is a symbol of longevity and nobility; in parts of Europe it is the flower of All Saints and remembrance. Dream books read it as honour and memory.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.