Everyone knows rosemary‘s for remembrance. Shakespeare also knew that fennel is for infidelity and columbines for insincerity.
What he didn’t know is that every flower stands for a state of mind. Some are quite specific.
Pohutukawa symbolizes the joy at seeing a friend totally own a celebrity on Twitter. Jacaranda is for the awkwardness of being too tall for an old cottage ceiling. Rafflesia is for the embarrassment at saying “you too” when a waiter tells you to enjoy your meal.