Thank you everyone for your replies,
and beautiful images.
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Since Iris is the Greek goddess for the Messenger of Love, her sacred
flower is considered the symbol of communication and messages.
Greek men would often plant an iris on the graves of their beloved
women as a tribute to the goddess Iris, whose duty it was to
take the souls of women to the Elysian fields.
- Hana No Monogatari: The Stories of Flowers