Here is a sweet little book I picked up long ago.

Jacket flap excerpt reads:
Father wanted to give Mother a present on their golden anniversary; instead of buying her a brooch or bracelet, he hit upon the happy plan of writing and illustrating a little book for her called The Language of Flowers, which has now been resurrected from some forgotten drawer and published.
♥

Written by 'Father' to 'Mother' on occasion of their golden wedding anniversary, August 8, 1913. It is a sweet little dictionary of over 700 flowers and reminiscent of a gentler era when people found time to express their affection in an individual way.

There is a language, "little known",
Lovers claim it as their own.
Its symbols smile upon the land,
Wrought by Nature's wondrous hand;
And in their silent beauty speak,
Of life and joy, to those who seek
For Love Divine and sunny hours
In the language of the flowers.
F.W.L.,
The Language of Flowers, London, 1875
The
language of flowers, sometimes called
floriography, was a Victorian-era means of communication in which various flowers and floral arrangements were used to send coded messages, allowing individuals to express feelings which otherwise could not be spoken. This language was most commonly communicated through Tussie-Mussies, an art which has a following today.
The nuances of the language are now mostly forgotten, but red roses still imply passionate, romantic love and pink roses a lesser affection; white roses suggest virtue and chastity and yellow roses still stand for friendship or devotion. Also commonly known meanings are sunflowers, which can indicate either haughtiness or respect – they were the favorite flower of St. Julie Billiart for this reason. Gerbera (daisy) means innocence or purity. The iris, being named for the messenger of the gods in Greek mythology, still represents the sending of a message. A pansy signifies thought, a daffodil regard, and a strand of ivy; fidelity.
(source: Wikipedia)