Iris

Possibly the most gorgeous colour in nature ..... always a joy when these come out ...

Apparently:
Since Iris is the Greek goddess for the Messenger of Love, her sacred flower is considered the symbol of communication and messages. Therefore the flower iris in the language of flowers symbolizes eloquence. Based on their color, irises convey varied messages. A purple iris is symbolic of wisdom and compliments. A blue iris symbolizes faith and hope. A yellow iris symbolizes passion while white iris symbolizes purity.

The purple and yellow ones abound, but the white seems to be scarce ....